com - Unbiased Gun Deals Toolcraft Black Nitride AR15 Bolt Carrier Group is a M16 Full Auto BCG, manufactured using a 9310 steel bolt, and a 8620 steel A mortise and tenon joint is the method of joining timber by working a solid rectangular projection in the one piece and cutting a corresponding cavity to receive it STRUCTURAL STEEL PLATE. The purpose of this chapter is to emphasise that understanding the system of steel specification—through classification, standards and grades of steels—is central to the exercise of steel selection and application. Perhaps look for a P6 supplier instead? Personally if I was making a new AR-15 bolt I'd go with S7 should handle the stresses of the firing cycle alittle better. 4140 chromoly, 16. Gas key is machined out of bar stock, chrome lined phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. The bore and bolt carrier are chrome lined. 330 Aviation Parkway Elizabethtown, NC 28337 The bolt assembly is CNC machined from Mil-Spec Carpenter No. comFind helpful customer reviews and review ratings for Stanley Hardware S808-790 1261 Automatic Gate Latches - Stainless Steel in Stainless Steel at Amazon. Bear Creek Arsenal AR-15 Rifle, 7. An educational, fair use website The coefficient of static friction for steel is around 0. kit comes with 416 Stainless Steel Barrel, 1x9 Button RH Twist, Aluminum Knurled Free Float Tube, Picatinny Rail Gas Block, Semi-Auto Bolt Carrier staked to Mil-Spec made from Carpenter 158 Steel Chrome Lined carrier Key and Carrier, Shot Peened MP Batch Tested Bolt, Choice of buttstock. Phosphate Coating Inside and Out (Bolt, Carrier, and Gas Key) Laser Engraved with ST Spider logo. 62x39 Caliber, Flat Top and Hard Case Phosphated 8620 Steel Carrier Assembly Carpenter 158 Bolt Heat Treated and Plated Mil-Spec Unlike lesser rifles, the SAINT™ AR15 is rock solid, with no accuracy-killing rattle or shake. Toolcraft's enhanced bolt carrier made of high-grade 9310 steel Then the bolt is made of carpenter 158 steel for a significantly longer life expectancy than standard mil-spec bolts. HPT (High Pressure Tested) and MPI Sep 29, 2014 In the case of the M16 family, the US military selected a steel called Carpenter 158 (also known as "C158" or "Car 158") to be used for May 12, 2016  9310 is a AISI standard grade of tool steel that makes it about ~7% stronger than "mil-spec" Carpenter 158 steels, when appropriately Jul 14, 2016 Carpenter No. ) When comparing 8620 to Carpenter 158 you will notice that 158 has a much lower carbon content, and higher Chromium and Nickel content than 8620. All BCG parts are nickel boron coated. It has high hardenability, high core hardness and high fatigue strength, all of Premium AR-15 5. 56 Complete Bolt Carrier Group is an essential addition to any AR build. 223 Finish: Nickel Boron Coating Bolt Steel: Milspec Carpenter No. 56 or . com. Gas key is secured with grade 8 fasteners and staked. Psa Logoed Premium 5 56 Nickel Boron Bcg With Carpenter 158 Bolt. 6651 155 FRY STEEL COMPANY (562) 802-2721 “COMPANY” SPECS (Continued) ROCKWELL: ABO 170-014 4750CLC Custom Leathercraft I823X Suede Carpenter's Nail And Tool Bag, 8 Pocket - Carpenter Tool Belt - Amazon. on the mall-ninja sites they go on an on about 158 steel and MPI inspection. Precision machined from Mil-Spec Carpenter 158® steel. Read B&G order page for professional B and G sprayers and parts. 423. It is renowned across the world for being very hard and strong, and resistant to wear. Sharps decided to stay with a standard Carpenter 158 steel extractor simply because the benefits of the S7 steel are minimized to that of the standard Carpenter steel during extractor final heat treatment. 56 CORE15® Mil-Spec Carpenter 158 Steel Bolt, M16 Chrome Lined 8620 Steel Carrier, Mil-Spec Staked Gas Key, Tool Steel Extractor, Shot Peened CHARGING HANDLE CORE15® Hardcore Billet Charging Handle V. 56/300AAC caliber AR-15 (or new builds). 8620 steel M-16 profile carrier is chrome lined and phosphate coated. com. 158 is used in the M16 or not, but I do know it is not a high-speed steel. 09. This is an extremely high-strength alloy mold steel consisting of carbon, silicon, nickel, manganese, chromium and iron. Bolt - Carpenter 158 - Cryptic Coatings. That is an excellent price compared to what they have been going for. 57, which is something like $70 off regular price. After all. Chrome Lined Bore and Chamber. Matte, fluted barrel is constructed of 416R stainless steel in a right-hand twist with one full turn every 8, for shooters who take long-range accuracy seriously. As I understand it, Carpenter 158 is a case(surface) hardened steel where 8620 is through hardened. PREMIUM CARBURIZING STEEL Typical Typical C Mn Si Ni Ni Cr Mo Composition 0. Carpenter 158 possesses the highest mold properties on any case hardening mold steel and also offers excellent wear resistance. Bolts break all the time, especially the lugs, but it's much more often when an 8620 bolt is used. 4. Therefore, there is no SAE standard for it and the sole manufacturer of this steel is a company called Carpenter Technology in Pennsylvania. 158® steel bolt Shot Peened Bolt Mag particle inspected Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert ToolCraft Logo PA-15 Engraving I don't know if Carpenter No. The SAE 9310 steel of our AR15 bolts is a superior steel alloy in virtually every way compared to the Carpenter 158®, whether in its resistance to structural failure or life expectancy, both of which far exceed current U. This LBE Unlimited MIL-SPEC bolt carrier assembly for AR-15 and M16 rifles is machined from phosphated 8620 steel, with a carpenter 158 bolt that is heat treated and plated for strength. retractable steel cable lanyard 20 6. MIL-SPEC MANGANESE PHOSPHATE Key Features CALIBER . Carrier key is chrome lined and staked per mil spec. Both are phosphate coated. DELTON ECHO 316L OPTICS READY with Blued Steel Barrel: Mil-Spec Chrome Lined Carrier Carpenter 158 Steel Bolt HPT/MPI Tested Chrome Lined Properly Staked and - Bolt made from Carpenter 158 Steel - Carrier made from 8620 steel - Black Nitride Finish - 4140 billet gas Key, properly staked and sealed - 4140 billet extractor - Mil-spec standard for heat treatment and QC - Made in the USA with a lifetime warranty - DPMS Compatible Product Description. The bolt is machined from magnetic particle inspected Carpenter 158 steel. 8 SPC) Lower Receiver: Forged 7075 T-6 Aluminum Upper Receiver: A3 Flattop Forged 7075 T-6 Aluminum, T-Marked The Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete has the same design as the Balanced Bolt Carrier Group and is precisely machined from S7 tool steel. 800. Gas key is machined out of bar stock, chrome lined phosphate coated, and Bolt material? 8620 vs No. If your Daniel Defense product shows evidence of such defects, Daniel Defense will make every accommodation to fix, repair, or replace your product in the most expeditious manner possible. Car 158 is the standard milspec for bolt. Our bolt assemblies are manufactured from Carpenter 158® Steel. 56 x 45mm Bolt & Carrier: Phosphated 8620 Steel Carrier Assembly Carpenter 158 Bolt Heat Treated and Plated Mil-Spec Chrome Lined Carrier Interior Carpenter 158 steel bolt cycles rounds efficiently. Carrier is chrome lined with chrome lined, hardened gas key and Grade 8 cap screws staked per Mil-Spec. Fits all AR-15-M16 Rifles • Use our Dealer Locator to find an authorized store near you. 00 US $ Buy Online Transformation Diagram Other Steel Data links Carbides in Steel Etchants Database Hardenability Diagrams of Steels Macro Defects in Steel Non-Metallic m16 bcg w/ carpenter 158 steel bolt, shot peened and magnetic particle 1 - 30 round magpul pmag gen m3 specifications. 22. It is machined to mate with the Compass Lake specification Chamber for highest possible accuracy. 223/5. 2017 · Caliber: 5. You can also choose from astm, aisi, and gb. Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel Nickel Boron Bolt Carrier Group – 158 – MPI M16 BCG (5. E4340 Steel Heat treated per Mil-Spec Requirements Carpenter 158 is a high technology steel that is very expensive and can only be ordered in 20,000 lb mill runs. com Carpenter has never made or even tested a single bolt, and doesn't warranty any of the bolts manufactured using it's 158 steel. 56MM WEIGHT 5. Both the carrier and key are chrome lined. Additionally, there was a perception that a NP3 coated extracter would be too slick and actually decrease reliability. Technical specifications of low content of carbon die steel Carpenter 158 data sheet, Carpenter 158 Chemical compositions,Carpenter 158 Mechanical property from Steelmaking, ESR melted, Blooming, Hot forging, Hot rolling, Heat treatment, Straightening, 100% Ultrasonic test, Cold working or rough turned machining. What interested me was the bolt material. The steel used is properly hardened, but I don’t think it’s technically Carpenter 158. On the outside, a hard-anodizing treatment protects your SAINT™ from both corrosion and the dings and blemishes that accompany hard use. Bolt Steel Carpenter 158 Vs 9310 Collections Photos. Analysis % Physical properties. mil-spec e8620. 158® Bolt(HPT/MPI/SP) M16 Profile Bolt Carrier Group, with Carpenter No. com FatMax® tHrU tanG WooD CHIsels • Full length blade guard – for added safety • Ergonomic soft grip handle – for maximum grip and control • Quality chrome alloy (ball bearing grade) steel – provides superior edge retention • Steel strikecap – can be used with a steel Givati Company Usa m-16 bolt carrier group , manufactured with the highest quality metal (158 Carpenter bolt) 8620 carrier heat treated to milspec , nickle boron coated with proper thickness to ensure functionality. C max. Being Aircraft Quality 9310, it is free from any impurities, making it stronger than standard 9310 steel and much stronger than the mil-spec carpenter 158 steel. However for the M4 purists we offer our BCG with the optional Carpenter 158 bolt made to current Mil-Spec including phosphate rather than Melonite treatment which comes with the 9310 Our new BCG is precision machined from 8620 Steel with a shot peened bolt manufactured from Carpenter 158 and Magnetically Particle Inspected. Bolt carrier: 8620 steel Phosphate coated Chrome-lined bore M-16-style with more mass for better functioning in semi or full-auto rifles. Carpenter 158® Steel, Shot Peened. com offers 1,864 carpenter steel products. The bolt is made from Carpenter 158 steel and it is high pressure tested (HPT) and magnetic particle inspected (MPI). And 8620 steel will work with the carrier, though it’s not strong enough for the bolt. Your single source for all grades of Scrap Metal Marketing. 29 . It is a product of the Carpenter steel company, the sole maker, and you won't find it on the SAE list (although if you did it would probably be known as 3310). 158 alloy is a chrome-nickel alloy steel with an analysis representing the best case hardening steel known for parts subject to heavy shock and wear. HPT Bolt (High Pressure Tested/ Proof) MPI Bolt (Magnetic Particle Inspected) Shot Peened Bolt. 158 Shot Peened Bolt High pressure tested Mag particle inspected Gas Key Выгодно купить механические и электроточилки, мусаты, точильные камни, бруски и другие Cryptic Coatings Mystic Black Complete Bolt Carrier Group with Carpenter 158 HPT/MPI Tested BoltIndustrial Metal Sales Cut to Size Metal Online Metal Sales 6061 Aluminum 7075 Aluminum 4130 Bar Carpenter 158 Rod1 PICTORIAL INDEX PIPE ATTACHMENTS C L C L Figure 1A Band Hanger Page 11 Figure 34 Hinge Hanger Page 13 Figure 72 Pipe Clip Page 15 Figures 81, 81BRT, 81PT, 81SG155 Specifications FRYQUOTES@FRYSTEEL. Carpenter 158 is just ANSI P6 steel. The 1:8 twist barrel is 9 inches (requires NFA-registered or pistol lower). The entire carrier assembly is NiB, Electroless Nickel Boron coated with the patented, advanced UCT EXO process, unlike standard NiB coatings. 158 Steel Profile: Full Auto Profile Gas Key: Grade 8 Hardened Fasteners, Staked per MilSpec. Finally, the barrel, A. UNS T51606 AISI P-6 Made In USA. Start your search by typing in the business name below. Further, the carrier is internally chrome-lined. Bolt Assembly: 8620 steel carrier, M16 spec, with Carpenter 158 steel bolt, which is shot peened, HP and MPI tested, with tool steel extractor, Colt "Gold" spring and solid one piece firing pin retaining pin. Carpenter 158 steel can continue to function where slightly softer steels such as 8620 could falter. Add : ECHO 316H MLOK MSRP $863. We noticed even after 4,000 rounds it is still black with no signs of excessive wear. New, by popular demand, all our AR-15 Toolcraft BCG's will feature Mil-Spec Carpenter No. 158® steel, shot peened for increased strength, includes tool steel machined extractor, BCM Extractor Spring, and is MPI (Magnetic Partical Inspected). It comes with a carpenter 158 steel bolt and has a web sling in the box. 56/. 56 NATO / . Complete AR-15 AR15 bolt and carrier assembly comes assembled for your AR-15 ar15 m-16 m16 rifle. 10 0. It starts with an M16 cut carrier that is made from 8620 steel and includes forward assist serrations. Windham Weaponry is proud to offer the highest quality rifles made anywhere. This would allow C-158 to be very hard on the outside to prevent The steel industry has advanced since the specification of Carpenter 158 but the basic premises for the selection remain even if the menu has now expanded. Steel comparison graphs, search 22. HPT/MPI Bolt Carrier has 5. I use standard 8620 carriers and only 9310 or Carpenter 158 bolts. Please email johnd@spikestactical. It is the only steel allowed by the US (and Foreign) Militarys for the very demanding needs of this high stress, critical part. captive push-pin takedown aerospace grade 7075-t6 forgings. Wert* and Ryan P. Carpenter 158 Steel 16” M4 Profile, Chrome Lined with A2 Flash Suppressor 4150 Chrome Moly Vanadium 11595E Steel w. 158 Shot Peened Bolt High pressure tested Mag particle inspected Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert Independently Certified Mil-Spec 11595E Barrel Steel. 223 Finish: Nickel Boron Coating Bolt Steel: Milspec Carpenter No. Bolt carrier groups are made from Carpenter 158 steel as well as 8620 steel, they are magnetic particle inspected and high pressure tested by an independent third party to guarantee results. Steel comparison graphs, search gun-deals. 800. 9310 is also a Carpenter product, but the make up of the steel differs between the two. Carrier – 8620 hardened steel, M16. Bolt Steel: Milspec Carpenter No. 5 Grendel BCG with a . The interesting thing about Carpenter 158 is that it is a proprietary steel alloy and its formula and method of manufacturing are not publicly defined. , Lime Street, Groves, Hull. Specification Chemical Max Mechanical Mpa, min C Mn Si S P %EL MinBatman v Superman: Dawn of Justice is a 2016 American superhero film featuring the DC Comics characters Batman and Superman. 8 SPC II Bolt is ready for use in any Mil-Spec Bolt Carrier. mil-spec carpenter 158. Inside the upper receiver is a full-auto-weight M16 bolt carrier group machined from Carpenter 158 steel. Bolt Carrier: Azimuth Shot-Peened, Magnetic Particle Inspected Mil Spec 8620 carrier, Melonite coated with 158 Carpenter Steel Bolt (6. ***THIS BCG IS A STANDARD 6. com - Unbiased Gun Deals Toolcraft Black Nitride AR15 Bolt Carrier Group is a M16 Full Auto BCG, manufactured using a 9310 steel bolt, and a 8620 steel 22. Shot-peened, mil-spec Carpenter 158 steel bolt, Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. gun-deals. if a . ) Falls 60 Feet from Bridge Platform. The barrel is constructed of 4150 chrome-moly vanadium 11595E steel with a 1:24 twist. Assembled, CHROME finished AR15 Bolt. The bolt is your standard AR bolt carrier group made of Carpenter 158 steel. aluminum finish. 223. 56/300 Blackout Ar 15 full Auto 7. m16 bcg w/ carpenter 158 steel bolt, shot peened and magnetic particle inspected to ensure it meets the most demanding durability requirements 1 - 30 round magpul pmag gen m3 specifications (st916556bffh) msrp: $1049 Carpenter 158 steel. I am looking to buy a new BCG for a new build and I am seeing a couple different kinds of steel. AR-15 bolts, for instance, are made of a steel known as Carpenter 158. stock & forearm. molybdenum and zinc. The XPB undergoes a 24-hour thermal cycle proprietary heat treatment and is finished with DLC (Diamond Like Carbon) Coating. 5 out of 5 stars 158. -M16 5. I have been partial to the Carpenter 158 material for bolts but, there are quite a few available in 9310 I know 9310 alloy steel is very strong (they make differential ring and pinion gears for professional class drag racing cars from it!) but on the M16/M4 the mil-spec is C158 - what is the pref 5. most bolts are made from this steel even the cheap ones as far as i can tell. com Bolt for M-15/M-16 or M-4 machined from Mil-Spec Carpenter 158® steel, shot peened for increased strength per Mil-Spec. The compound throat was causing issues to where the bullet would get stuck in the lands and grooves. COM 1. Bolt carrier is phosphated outside and chrome lined inside. 158® Alloy is a Steel material supplied by Carpenter Technology Corporation. No, only the bolt itself is usually 158 carpenter steel. Del-Ton, Inc. At the end of the day, it's much easier to screw up the heat treatment process on 9310. 158® steel Matched upper and lower made of 7075-T6 aircraft grade aluminum Buffer tubes made of extruded 7075-T6 aluminum The Bolt Assembly is coated Carpenter 158 steel. 223/300 AAC phosphate complete bolt carrier group. CORE Rifle Systems AR15 Bolt Assembly, Complete. Carpenter 158 Steel. Barrel: 20” Gov’t. S max. David E. 158® steel bolt Shot Peened Bolt High pressure tested Mag particle inspected Gas Mar 7, 2016 Technical specifications of low content of carbon die steel Carpenter 158 data sheet, Carpenter 158 Chemical compositions,Carpenter 158 As I understand it, Carpenter 158 is a case(surface) hardened steel where 8620 is through hardened. 6–0. If you need a Different Size or Length Please Contact us for Pricing Thru eBay , or we will set up a Custom eBay Auction Just for You. C-158 doesn't rely as much on proper heat treating. Directed by Zack Snyder, the film is the Country. Carrier key is chrome lined and stake per mil spec ALL ARM-4 kits come with M-4 Feed Ramp Extension and M-4 feed ramp upper receiver. Take this behind the scenes tour of Carpenter's main manufacturing facility in SAA AR-15 . A2 Profile, Chrome Lined with A2 Flash Suppressor. 158 Shot Peened Bolt High pressure tested Mag particle inspected Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert WCArmory 3 has had lots of requests for these 1B1B6 engraved mil spec / mil contract 1B1B6 carriers specifically. COM Full Auto Complete Bolt Carrier Group Bolt is Carpenter 158 steel, MPI, HPT, shot peened with a tool steel extractor and black extractor insert and tension enhancing o-ring. 6651 153 FRY STEEL COMPANY (562) 802-2721 Carpenter No. They learn to become carpenters while working under the guidance of an experienced carpenter. This alloy is ideally suited for jobs where an extra measure of core strength is required. No reason to buy anything AR15. nrmcry springfield armory tm —5. Bolt-Carrier Group: Enhanced M16 BCG w/ Carpenter 158 Steel Bolt, Shot Peened & Magnetic Particle Inspected, Melonite® Finish It is the front and rear end – the stock, barrel and handguard – where we begin to see changes. 5. Windham Weaponry Upper Receiver 16" M4 barrel Muzzle brake Carpenter 158 steel bolt carrier Less carry handle - King Shooters Supply - America's largest online firearms and accessories mall. You will likely find they don't advertise any of these specifications. Steel Distributors Warehouses in Carpenter on YP. S. Viton O-Ringed Extractor. The largest, most comperhensive, interactive, knife steel composition chart, with 981 steel alloy compositions, and 6374 names. Black Extractor Insert ALPHA Stainless Steel 308 MLOK Rifle MSRP $1,114. : 71-158-2017s journeyman carpenter and a crew foreman on this project. CarTech No. I have both 9310 bolts and C-158 bolts. BCGs are machined from Carpenter 158 Steel. 56 BOLT CARRIER GROUP NI-BO T/C ENGRAVED MPI C-158 COMPLETE - T00AUTO-010MT (Toolcraft Inc. Steel The main concern with a bolt carrier group is the type of steel it’s made out of. 223 Rem Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. mil-a-8625f black hardcoat anodize Bolt machined from Mil-Spec Carpenter No. This combination of properties makes it suitable for many hot-work and cold-work applications. Si max. Our standard bolt carriers are made from 8620 tool steel. by Swanson Tool Co. 3. As a result, Carpenter 158 steel is DELTON ECHO 316L OPTICS READY Assembly Mil-Spec Chrome Lined Carrier Carpenter 158 Steel Bolt HPT/MPI Tested Chrome Lined Properly Staked and Sealed Gas Key with Improvements like black nitride, s hot peening, MPI (Magnetic Particle Inspected) HP (High Pressure Tested), Carpenter 158 Steel Bolt; 8620 M16 carrier, Properly staked 4140 Machined Gas Key fastened with Michiguns OCKS Fasteners and Free Gas Rings for LIFE. 56/. 158®, which is Shot Peened, High Pressure Tested, and Magnetic Particle Inspected per Mil Spec Super high-quality carpenter 158 steel then they are Nitirde finished for a lifetime of service. 158 steel. Conversely, LWD provides a lifetime guarantee on the bolt they engineered, tested, and manufactured using 9310. Black Extractor Buffer. The Carriers and cams are finished in a proprietary Nickel-Teflon coating that nearly eliminates corrosion while providing greatly increased lubricity. Black Extractor Insert Carpenter 158 Steel 16” M4 Profile, Chrome Lined with Compliant Welded Muzzle Brake 4150 Chrome Moly Vanadium 11595E Steel w. Swanson Tool T0118 Speedlite Square Layout Tool, Orange. рег-ции: или выберите эмитента из списка: (для выбора Messrs R. And what about stainless steel? Developed before World War I. The data contained in this bulletin is believed to be accurate at time of going to press. retractable steel cable lanyard Falls 60 Feet from Bridge Platform. Included is a matched bolt made from 9310AQ. The bolt assembly is machined from the correct Mil-Spec Carpenter No. It is a product of the Carpenter steel company. Please try our eBay store for more Deals like this one This is our high quality bolt made from Mil-Spec 158 Carpenter Steel. 2666 to acquire a Return Merchandise Authorization Number (RMA. Rating Precision machined from 4340 tool steel alloy per SAE AMS6415T/AMS6484D (vs 4140), Titanium Nitride coated Milspec Carpenter No. PSA premium is comparable to the minimum specs from any good companies. Black Nitride is quickly becoming the go-to finish for AR parts. Carpenter Technology Corporation is a leading producer and distributor of premium specialty alloys, including titanium alloys, powder metals, stainless steels, alloy steels, and tool steels. Bolt Assembly MPI/HPT tested machined from Carpenter No. 56 variant parts groups and bolt carriers. 15 and the coefficient of Machined from Milspec Carpenter No. 2 Trademark Carpenter Technology 3 Trademark United Technology 4 Trademark SPS Technology GENERAL INFORMATION 153 Specifications FRYQUOTES@FRYSTEEL. Machined from 8620 steel Carrier has forward assist serrations Black Nitride Finish - advanced lower friction coating that minimizes the need for lubricants and cleaning Return Authorization is required for all returned merchandise. Sharps Relia Bolt For The Ar 15 Alloutdoor. The LANTAC E-BCG Enhanced Bolt Carrier Group is precision machined from 8620 Steel with a shot peened bolt manufactured from Carpenter 158 and Magnetically Particle Inspected. Bolt assembly for M-15/M-16 or M-4 machined from Mil-Spec Carpenter No. Stanley 45-912 8 Inch X 12 Inch Steel Carpenter'S Square. Mn max. Whats the difference between 9310 bolt and carpenter 158 bolt? looking to buy a couple complete BCGs and wondering what the difference is between 9310 and C-158 steel? the C-158 is a few dollars more but with extra for tax & shipping while the 9310 is about $15 less and i wouldn't have to pay tax or shipping saving me around $30 per. Heat Treated and Phosphated. Gas key: 4130 steel Black nitride steel edge of the main form and h e fell 60 carpenter died when he fell 60 feet from a 71 -158-2017. Compatible with all existing . M16 158 carpenter 5. Transformation Diagram Price: 30. COM 1. Yield strength N/mm2. 9310 is a AISI standard grade of tool steel that makes it about ~7% stronger than "mil-spec" Carpenter 158 steels, when appropriately treated. com UNS T51606 AISI P-6 Made In USA. Inside the upper receiver is an M16 bolt carrier group machined from Carpenter 158 steel. First thing to do with a new Our Products >> FailZero EXO Nickel Boron Bolt Carrier Group M16/M4 5. 223 Rem, 9310 Steel -or- Carpenter 158 Bolt, Black Nitride coated, Shot Peened, MPI inspected Available in either 9310 or C158 Steel Bolt. The high nickel content gives it some reasonable depth of hardening, but as you said, it needs to be carburized to attain a higher hardness for use. Carpenter 158 and 9310 steel are the best materials for the bolt. The gas-key is heat-treated and properly staked. Carpenter 158 Steel Heat treated per mil-spec requirements Shot-peened per mil-spec requirements MPI-tested material Nickel-boron coated. 158® alloy is a chrome-nickel alloy steel with an analysis representing the best case hardening steel known for parts subject to heavy shock and Nov 14, 2013 The steel industry has advanced since the specification of Carpenter 158 but the basic premises for the selection remain even if the menu has Bolt for M-15/M-16 or M-4 machined from Mil-Spec Carpenter 158® steel, shot peened for increased strength per Mil-Spec. Following the 1913 invention of "rustless steels," later known as stainless steels, Carpenter and four other American producers purchased minority interests in the American Stainless Steel Co 2 Trademark Carpenter Technology 3 Trademark United Technology 4 Trademark SPS Technology GENERAL INFORMATION 153 Specifications FRYQUOTES@FRYSTEEL. 50 0. Complete Phosphate M-16 BCG. 158 Carpenter steel VS 9310 steel Bolt Carrier Group, which one is better and why? Wilson combat has a 9310 steel Bolt Carrier Group on sale for $98. and Semi Auto Lower receiver parts kit. . Barrel: Chrome Moly Vanadium Heavy Profile M4 Feed Ramps 16" Length, 1x9 Twist Manganese Phosphated Phosphated under Front Sight Base Taper Pins on F-Marked Front Sight Base Threaded Muzzle, A2 Flash Hider Chamber: 5. 136" Bolt Face Depth WITH FOR USE WITH ANY 6. The bolts are shot-peened, heat treated, and 100% Magnetic Particle Inspected per US mil-spec. #158 carpenter steel is the military spec material for the bolts. 8620 Tool Steel BOLT CARRIER GROUP: M16 BCG w/ Carpenter 158 Steel Bolt, Shot Peened & Magnetic Particle Inspected MAGAZINE: 1 - 30 Round Magpul PMAG Gen M3. ). R eplacement Assembled Bolt for the . This 5. 56 Nickel Boron Bolt Carrier Group With Carpenter 158 Bolt Caliber: 5. Lower Build Kit: IO enhanced EPT Lower Build Kit, Black Some carpenters work as construction laborers or helpers before becoming carpenters. This home was built in 1893 and last sold on 5/25/2017 for $572,000. 0 bath property. 1 Carpenter 158 is a high technology steel that is very expensive and can only be ordered in 20,000 lb mill runs. The shorter the better!! I'm going to need sights, LPK and especially some type of pistol buffer tube. Email us your Custom Sizes for a Rapid Response to sales@industrialmetalsales. Toolcraft assembles the 1B1B6 carrier to an MPI inspected Carpenter 158 bolt to make a complete BCG. SPECS: Bolt – Carpenter 158 steel, Magnetic Particle Inspected, High Pressure Tested. Q. Includes Charging Handle. The Carpenter 158 tool steel bolt is as strong as they come and will function perfectly under the worst of conditions. 00 US $ Buy Online Transformation Diagram Other Steel Data links Carbides in Steel Etchants Database Hardenability Diagrams of Steels Macro Defects in Steel Non-Metallic Inclusions in Steel Tempering Diagrams of Steels CCT HRC of 46 yields a 15% increase in hardness at the same toughness comparing to Carpenter 158 & 9310 Technical Data on DLC Coating Coating thickness: 2 - 4 μm (Micro Meter) or 2-4 μ (Microns) scr, ares scr, sport configurable STEEL FINISH. SPIKES BCG 158 carpenter steel First things you should do with a new BCG (Bolt Carrier Group) Inspect, disassemble, clean, lube, re assemble, Function test. Others. IN STOCK ON SALE The . 20 0. 76 tons 74 x 18 Paper # 1244 : What is the effect of lipophilic polymeric ionic liquids on friction and wear? AP Bapat, R Erck, BT Seymour, B Zhao: Reactive and Functional Polymers Paper # 1244 : What is the effect of lipophilic polymeric ionic liquids on friction and wear? AP Bapat, R Erck, BT Seymour, B Zhao: Reactive and Functional Polymers 22. Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected. Crafted from Mil-Spec Shot Peened Carpenter 158 to offer the best case hardening known for parts subject to heavy shock and wear. Crypticcoatings. 25” 1/9 twist. BCG is made from 158 carpenter steel. Aluminum, Steel, Copper, Die-Cast Alloys, Deox Aluminum, Scrap Metal material handling, and Transportation specialists. 1 percent makes the 4150 alloy so much harder that it becomes a lot more difficult to work with. I bough one a month or so ago for twice that. Lower Build Kit: IO enhanced EPT Lower Build Kit, Black Bolt: Carpenter 158, shot peened and batch MPI inspected, phosphate coating S7 Tool Steel extractor with o-ring and buffer on spring Gas key: 4140 billet, heat treated and chrome lined bore with milspec phosphate coating With that in mind FailZero obviously performs a significant amount of polishing before the application because post conversion of a Carpenter 158 Bolt and 8620 Steel Carrier into a FailZero Bolt Carrier Group (BCG) delivers a mirror polished stainless steel look. It is a mold steel as indicated by the "P" in the P6 designation. Carpenter Ltd reserves the right to amend product data without prior notification. Bolt - Carpenter 158 Bolt for M-15/M-16 or M-4 machined from Mil-Spec Carpenter 158® steel, shot peened for increased strength per Mil-Spec. 158 Steel: Mil-spec bolt carriers are made from Carpenter No. S. Related Items: Carpenter 158 is the traditional mil-spec bolt material. The 3,975 sq. Bolt machined from Mil-Spec Carpenter No. 158® Steel HPT/MPI (High Pressure Tested/Proof) · (Magnetic Particle Inspected) Shot Peened Tool Steel Extractor w/ BCM® Extractor Spring Chrome Lined Carrier (Full Auto Profile) Hardened, Chrome Lined Gas Key w/Staked Grade 8 Fasteners per Milspec All Daniel Defense products carry a 100% satisfaction guarantee against defects in original materials and workmanship. Replacement Assembled Bolt for the . Abbott & Co. Brownells and Aim Surplus has a carrier made from Hardened 8620 and the bolt is 9310, Bravo Co. Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked “MULTI” for caliber. CORE15® Mil-Spec Carpenter 158 Steel Bolt, M16 Chrome Lined 8620 Steel Carrier, Mil-Spec Staked Gas Key, Tool Steel Extractor, Shot Peened CHARGING HANDLE CORE15® Hardcore Billet Charging Handle V. Bolt carrier is nitrited and bolt head parkerized and MPI. Phosphate Coated Chrome Lined Milspec Carpenter No. Completely assembled with standard bolt parts: Extractor assembly, Ejector assembly, Gas Rings. The bolts are shot peened and come with the black extractor insert as well as black “O” ring upgrade. 56) Milspec Carpenter No. The carrier interior and carrier key are chrome lined for corrosion and friction resistance. The gas key is made from 4140 and it is properly staked. 2. 158® steel. See reviews, photos, directions, phone numbers and more for the best Steel Distributors & Warehouses in Carpenter, WY. SAA AR-15 . 5 Grendel Bolt Carrier Group 158 Carpenter SP/MPI. Carrier is chrome lined, made from Carpenter 158 steel, and coated per mil spec. 750" diameter at gas block-1/2-28 threaded muzzle/barrel-Steel Low profile gas block with carpenter 158 screws-Carbine gas system-A2 Muzzle Device-12" Thin Keymod Rail Steel group: Plastic mould steels Note: No data Reference: Not shown in this demo version. kit comes with 416 Stainless Steel Barrel, 1x10 Button RH Twist, Aluminum Knurled Free Float Tube, Picatinny Rail Gas Block, Semi-Auto Bolt Carrier staked to Mil-Spec made from Carpenter 158 Steel Chrome Lined carrier Key and Carrier, Shot Peened MP Batch Tested Bolt, Choice of buttstock. military specifications. 158® steel bolt Shot Peened Bolt Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Alloy Mold Steel in the Form of Wire, Strips, Bars, Billets and Shapes The United Brotherhood of Carpenters and Joiners of America represents more than a half-million men and women who perform safe, productive work every day. This narrative was developedto alert employers and It is a 5. Which ever bolt you choose to get, just make sure you're buying it from a reliable company and your chances of failure should be pretty damn slim. The bolts are also Shot Peened and MPI (Magnetic Particle Inspected) and feature Billet Machined Extractors with Black Insert and O-Ring upgrade. 158® steel HPT Bolt (High Pressure Tested/ Proof) MPI Bolt (Magnetic Particle Inspected) Shot Peened Bolt Chrome Lined Carrier (AUTO) Chrome Lined Gas Key Gas Key Hardened to USGI Specifications Grade 8 Hardened Fasteners Key Staked Per Mil-Spec Tool Steel Extractor BCM® Extractor Spring Black Fast delivery and knowledgeable staff, call Mastersource for all your Tool Steel needs. C158 costs a premium because Carpenter 158 is trademarked/patented, and a brand-name alloy made in one facility by Carpenter. Gas Keys are also hardened and Chrome lined. 5 Grendel Bull Barrel Rifle Kit. HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected). 12 GENERAL CHARACTERISTICS LESCALLOY 9310 VAC-ARC steel is a premium quality alloy carburizing steel produced by the vacuum consumable electrode process. Carpenter No. As well as from free samples, paid samples. 158® Steel HPT/MPI (High Pressure Tested/Proof) · (Magnetic Particle Inspected) Shot Peened Tool Steel Extractor w/ BCM® Extractor Spring Chrome Lined Carrier (Full Auto Profile) Hardened, Chrome Lined Gas Key w/Staked Grade 8 Fasteners per Milspec Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. the SAE standards are merely a list of ingredients. 158 is truly an alloy metal, while 8620 is a low alloy metal. Bolt is made of shot-peened, Mil-spec Carpenter 158 steel. 8 SPC) Lower Receiver: Forged 7075 T-6 Aluminum Upper Receiver: A3 Flattop Forged 7075 T-6 Aluminum, T-Marked Bolt Carrier: Azimuth Shot-Peened, Magnetic Particle Inspected Mil Spec 8620 carrier, Melonite coated with 158 Carpenter Steel Bolt (6. Following the 1913 invention of "rustless steels," later known as stainless steels, Carpenter and four other American producers purchased minority interests in the American Stainless Steel Co What interested me was the bolt material. The 16" Chrome Moly Vanadium barrel is treated with Melonite and has a 1:8" twist rate for complete ammunition flexibility. barrel. Milspec Carpenter No. stainless steel improves performance of equipment in aerospace, medical instruments, oil drilling, firearms, and marine applications. CarTech® No. 224 Valkyrie / 6. Lastly, the MSR15 Patrol we evaluated we had the forward assist and the standard AR dust cover, components other AR manufactures often eliminate to cut costs. We stock over 8,000 Sizes of Metal in Stock. 158® steel, shot peened for increased strength, includes tool steel machined extractor and ejector, BCM Extractor Spring, and is HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected). manganese. Aero Precision is a leader in AR15 parts manufacturing and this Bolt Carrier Group is one of the best! The bolt is milled from mil spec Carpenter 158 tool steel before being High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) Alibaba. 158® steel bolt Shot Peened Bolt Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert 223/5. 56 CHROME Bolt Assembly Carpenter 158 - MPI Tested. Carpenter 2018 JOIN US Coefficients of Friction for Steel. receivers. Staked Per Mil-Spec. Each and every one is shot peened and magnetic particle inspected for long-term durability. AR15. I bought a Carpenter steel bolt years ago from Fulton Amory more out of convenience than choice (back ~1998 or so. S7 tool steel–When compared to mil spec Carpenter 158, the S7 steel provides a 75% increase in tensile strength and 60% improvement in yield strength. Chrome Lined Carrier (AUTO) Chrome Lined Gas Key AIM Surplus just introduced their new Black Nitride AR15 Bolt made from Carpenter 158 steel. 928. 158® steel and shot peened for increased strength per Mil-Spec; includes tool steel extractor with spring and viton O-ring; firing pin chromed finished with firing pin retaining pin and cam pin. 1. The bolt assembly is machined from Carpenter 158 steel, MPI Tested and shot peened for increased strength, includes tool steel machined extractor and ejector, and extractor spring. Matte black phosphate finish. Comes with M4 Feed Ramps and " F " Marked front sight base. It's an older steel alloy but some folks swear by it. 223)-16" M4 Profile barrel with M4 Extension-1/8 Barrel Twist-. 95 CARPENTER & PATERSON, INC. As testament to that quality, we back our rifles with a Lifetime Warranty that is also transferrable to subsequent owners. 55 AR15 Toolcraft Nickel Boron BCG - 9310 Steel -or- Carpenter 158 Steel Bolt, MPI Inspected, expertly machined, and a hassle free Lifetime Warranty! 9310 or Carpenter 158 Steel: Ballistic Advantage Performance Series AR15 barrel combines the durability and strength of 4150 chrome moly vanadium steel with the Beyond using Carpenter's 158 alloy for the bolt, ask what alloy they use for their extractors, Extractor pins, ejectors, and whether their cam pins have a solid film lube per TDP. Figure 158 Ductile Iron Pipe Clamp Page 38 Stamped Steel Hanger Page 14 Figure 72CT Copper Tubing Pipe Clip Carrier is chrome lined, made from Carpenter 158 steel, and black phospate coated per mil spec. Material matters, and the Carpenter 158 steel of the standard Mil-spec bolt is suboptimal for such a high-load application leading to a life expectancy of only about 6,000 rounds. 158 CARPENTER LN , PHILADELPHIA, PA 19119-2563 is currently not for sale. Full-auto chamber dimensions enhance feeding and extraction compared to a match chamber. 423. 56 Mil-Spec Bolt Assembly and Cam Pin are Nickel Boron Coated. Nickel boron coated full-auto profile bolt carrier group. com or call 407. Mil Spec Carrier. Bolt Material: Carpenter 158 Steel. Chrome Lined Carrier (AUTO) Chrome Lined Gas Key. Tensile strength N/mm2Search engineering materials products based on manufacturer, supplier, distributor, or compounder; view technical data sheets for polyimide, LCP, polyetherimide Название эмитента, ИНН или № гос. Batch MP Tested, Unmarked . Carpenter 158 steel. 158® steel vs 9310 Ill only buy a bolt thats made out of carpenter 158, it also has to be MPI and HP tested. 158 Shot Peened Bolt High pressure tested Mag particle inspected Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Bolt - Carpenter 158 Steel, heat treated per Mil-Spec requirements Extractor - aircraft quality E4140 Steel, heat treated and shot peened per Mil-Spec requirements, Manganese Phosphate coated per Mil-Spec requirements Bolt Carrier: Carpenter 158 Steel Lower Receiver : Forged 7075 T6 Aircraft Aluminum with Aluminum Trigger Guard Upper Receiver : M4A4 Type Flat Top Upper Receiver Home / Parts / RIFLE PARTS / Grant Defense Nickel Boron BCG with M16 Carrier & Carpenter 158 HPT/MPI Bolt Grant Defense Nickel Boron BCG with M16 Carrier & Carpenter 158 HPT/MPI Bolt $ 189. Description: 223 Stripped Bolt Material: Carpenter 158 Steel Process: Parts are machined from solid, heat treated, degreased, stainless steel bead blasted and black phosphate coated per MIL-DTL-16232 Type M Class 2. The barrel is threaded and tipped with an A2-style flash hider sized up to fit the bigger bore. 2 MIL-STD-171 phosphate finish inside and out with 1. Typically the AR15 community looks for C-158 which is a blend of steel from Carpenter. "Shamrock" Schooner built in 1863 for R. 25 1. SHARP Report No. -Phosphate barrel finish-Chambered in 5. MPI Tested Barrel: 4140 Melonite Steel 16" Length, 1x9 Twist Carbine Gas System Threaded Muzzle, A2 Flash Hider Manganese Phosphated Melonite under Standard A2 Front Sight Base Lightweight Profile Chamber: 5. 158® Steel (Bolt) 8620 Tool Steel (Carrier) Mil-Spec Extractor Spring, black Del-Ton, Inc AR-15 AR15 M-16 M16 bolt and carrier assembly. carpenter 158 steelCarpenter No. Completing the foundation, the SAINT features micro-polished trigger components treated with nickel boron. Gillian, Middlesborough, for the Stockton coastal trade. Each bolt is shot peened and comes with a heavy extractor spring & black spring insert. 5 Grendel BARREL also known as Grendel Type 2. However, at under $100, an HPT and MPI tested BCG is an unreal value. Since the creation of Carpenter 158, the metals industry has continued to innovate, creating new blends of steels. N max. It has good resistance to softening at moderately high temperatures. Finish is hardcoat anodized. M4 Feed Ramps 1 Turn in 9” - Right Hand Twist 6 Position Telescoping Buttstock with Windham Weaponry Logo M4 Double Heat Shield Handguards / A2 Black Plastic Grip A4 Dual Aperture Elevation & Windage Adjustable: 300 - 600 M Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. High Pressure Tested Magnetic Particle Inspected Sprinco Extra Power Extractor Spring Carpenter Metal Solutions Inc. Manganese Phosphate Barrel Finish on entire barrel. Bill Alexander 11-14-13, 13:53 #6 Carpenter No. Tool Steel Extractor. Bolt carrier is parkerized outside and chrome lined inside. 25 3. Many Metallurgists consider AISI 9310 alloy steel as an acceptable bolt material and substitute for Carpenter 158 (Carpenters brand name AISI P6 Spec mold steel). H&M Nitride finished giving you the shooter the longest wearing & hardest finish avail with an exterior Rockwell hardness of 85 this bolt will remain rust The SAE 9310 steel of our AR15 bolts is a superior steel alloy in virtually every way compared to the Carpenter 158®, whether in its resistance to structural failure or life expectancy, both of which far exceed current U. Steel group: Plastic mould tool steels Note: Austenitizing temperature: 1450 o F (788 o C). Bolt Finish: Nitride Bolt Steel: Carpenter No. 7 LBS OAL 37” BOLT MIL-SPEC CARPENTER than Carpenter 158 for AR bolts? Probably. single-family home is a 6 bed, 4. Grade 8 Hardened Fasteners Key. 56 w/ Logo Bolt is Carpenter 158 steel; Precision machined from 416R Stainless Steel, it includes a matched bolt machined from Carpenter 158 Steel which has been magnetic particle and high pressure tested. P max. 1 Aero Precision's 5. stanleyworks. high-impact synthetic polymer, stock - sporter style profile & handguard - carbine length magpul moe. 3/4" Diameter x 12"-Long Carpenter 158 Round Bar . carpenter 158 steel We Always Combine Shipping to Save you Money . 56 X 45 mm Nato Bolt And Carrier: Phosphated 8620 Steel Carrier Assembly Carpenter 158 Bolt HPT/MPI Tested Heat Treated and The magazine wells are broached to give an excellent finish on the magwell. Steel comparison graphs, search . 56 Bolt Assembly Carpenter 158 - MPI Tested. Reference: Not shown in this demo version. Carpenter Ltd can assume no liability for results obtained or damages incured through the application of the data and tests presented. Machined from Milspec Carpenter No. Last edited: Jan 6, 2014 The bolt assembly is machined from the correct Mil-Spec Carpenter No. 56 NATO (accepts 5. Bolt Steel: Carpenter 158 Bolt Carrier Profile: Full-auto Charging Handle included: Yes Now, I need some build ideas for the rest of the gunpost some photos of your AR pistols. 2 MIL-STD-171 hard chrome bore. 56 X 45 mm Nato and the bolt carrier is a phosphated 8620 steel carrier assembly. 01 . 158® alloy is a chrome-nickel alloy steel with an analysis representing the best case hardening steel known for parts subject to heavy shock and wear. TOOLCRAFT BCG . Bolt Carrier Group: M16 Cut, 8620 Steel, Phosphate Finish, Properly Staked, Carpenter 158 Bolt, HP and MPI Tested Muzzle Device: Standard A2 Flash Hider Lower: Gen 2 Lower Receiver with flared magwell and upper tension screw Carpenter is a global leader in the manufacturer of specialty alloys, stainless steels, titanium and powder alloys. SIONICS BCG Completion Kit includes our HP/MP Bolt, Cam Pin, Firing Pin & Firing Pin Retaining Pin. 158® (P6) Plastic Mold Steel AISI 420 AISI P20 AISI H13. 6651 153 FRY STEEL COMPANY (562) 802-2721 9310 steel vs carpenter 158, 9310 vs carpenter 158, are daniel defense rifles worth the money, carpenter 158 steel vs 9310, daniel defense, daniel defense vs sig sauer, Carpenter 158 steel is simply a proprietary alloy that is made by Carpenter Technology Corporation. The coating makes easier cleaning Bolt Features Carpenter 158 Steel Heat treated Shot Peened MPI Tested MaterialNickel Boron CoatedBolt Carrier Features 8620 SteelNickel Boron CoatedNickel Boron Coated BoreFull Auto M-16 Style with more mass for mass . DiSabella* Carpenter Technology Corp. Not sure if I want to go hex, micro or Shockwave Blade? SOLGW Bolt Carrier Group 158 Carpenter SP/HPT/MPI : Bolt Carrier Group: Sons of Liberty Gun Works Bolt Carrier Group HPT/MPI Ejector: S7 Tool Steel, heat 158 carpenter’s tools www. Our Products >> Carpenter 158 >> 3/4" Diameter Carpenter 158 Round Bar 3/4" Diameter Carpenter 158 Round Bar Carpenter 158 Round Bar 3/4" Diameter x 12"-Long $15. 62x39 BCG w/Carpenter 158 Bolt melonite This complete M16 Bolt Carrier Assembly is Chrome Lined inside the Carrier for long wear, and includes a staked-on Gas Key with Chrome Lining, a complete Bolt Assembly, Cam Pin, Firing Pin, and Firing Pin Retaining Pin. M4 Feed Ramps R16M4A4PT-MA. Our upper receivers also include the teflon dry lube as required mil-spec. It is a very high strength, case hardenable alloy, with excellent wear resistance. 56 Bolt Carrier Group - Carpenter No. -Carpenter 158 Bolt, and a full profile chrome lined carrier. The fact that it is a Surface Treatment (Molten Salt Bath) and not a coating gives it better durability and boasts some Just understand this. This is an extremely high-strength alloy mold steel Caliber: 5. SOLGW 6. Each carrier inspected for extreme safety making this one of the highest quality Bolt Carriers made to exact mil spec. ft. The reason they mention carpenter 158 bolt is because they also sell cheaper version bolt in 8620. A mid-length gas system paired with a heavy tungsten buffer, the Saint also has an M16 bolt carrier group machined from Carpenter 158 steel, shot peened and magnetic particle inspected. Wyomissing, Pennsylvania ustom 465 stainless steel is a premium double vacuum-melted, martensitic, age-hardenable -4150 Chrome Moly Vanadium Steel Barrel. Are your barrels chrome-lined? Why not? Bolt machined from Mil-Spec Carpenter No. Steel grade. Made in USA. 223/300 AAC blackout Complete Bolt and Carrier Group is chrome lined, made from 8620 steel, Bolt is made from 158 carpenter steel and coated per mil spec. About 2% of these are steel round bars, 2% are steel sheets, and 1% are drill bit. Standard. Gas Key Hardened to USGI Specifications. A wide variety of carpenter steel options are available to you, such as metal, carbon steel, and steel. 158® steel, shot peened for increased strength per Mil-Spec, includes Mil-Spec 8620 tool steel extractor w/ viton insert and improved design spring that dose not require an o-ring, Mil-Spec ejector and spring. Black Nitride AR15 Bolt made from Carpenter 158 steel. Last edited: Jan 6, 2014 Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected. All parts are machined, heat treated & finished to US mil-specs all steel is correct including 158 Carpenter steel for the bolt. The BCM bolt assembly is machined from the correct Milspec Carpenter No. Carpenter S7 is a general purpose air hardening tool steel having high impact and shock resistance. The mil-spec specifies that the bolt be made of Carpenter 158 steel and the carrier be made of 8620. barrel extension