Carpenter 158 Bolt

Carpenter Technologies 158 blend of steel was selected as it provided adequate strength and. Bolt Mil-Spec M-15M-16 or M-4.

Lantac E Bcg Bolt Carrier Group Lantac Bolt

AR15 M16 556 Bolt -.

Carpenter 158 bolt. 8620 Aircraft Grade Steel Extractor. Mil-spec 8740 steel with hard chrome finish Gas Key. Ad Safe Trading Stainless Fasteners on Leading B2B Platform.

Whether its a new build or simply a spare part you can be sure that our premium bolt will serve you a lifetime. The bolt is cut from Carpenter 158 tool steel and shot peened to relieve stress and increase durability. American built arms bolt carrier group spike s tactical nickel boron m16 bcg full auto 5 56 bcg w carpenter 158 bolt ar15 bolt carrier group carpenter 158 premium 5 56 nickel boron bcg with.

When it comes to bolt carrier group materials 9310 8620 and Carpenter 158 steel work well. HPT High Pressure Tested and MPI Magnetic Particle Inspected. Because of these characteristics Carpenter 158 is the standard that other bolt materials are measured by.

Firing pin chromed finished with firing pin retaining pin and cam pin. Precision machined beyond mil-spec quality. Mil-Spec Carpenter 158 steel - 223 556 300 AAC Blackout Mil-Spec 9310 steel - All other calibers Shot Peened.

Carpenter 158 is without doubt an excellent material for the production of M16 bolts. The bolt assembly is CNC machined from Carpenter 158 steel and shot peened for increased strength per Mil-Spec. Each bolt is high pressure tested and magnetic particle inspected against defects and finished along with the carrier gas key and cam pin with a tough NP3 treatment to reduce friction and carbon build up for easy cleaning and lower.

In fact standard bolts will start to show stress cracks on the locking lugs adjacent to the extractor cut after only 3000 rounds. AR15 M16 556 Bolt Complete. I figured since their rifles came with 158 Carpenter steel bolts their PSA house branded bolts sold separately were the same as the ones in their rifles.

Trusted China Suppliers Verified by SGS. Carpenter Technologies 158 alloy steel was selected as the Mil Spec when the AR-15 chambered for the lower pressure 223 Remington round was upgraded to the higher pressure 556 NATO. C158 steel is a proprietary type of steel developed for the US.

The military went searching for better material constrained by the size of the bolt. Toolcraft premium carpenter 158 nickel wilson bat trbcanb308 bolt carrier psa ar15 m16 mil spec charging handle ar 15 m16 bolt embly hpt mpiPsa Dom Ar 15 Nitride Bolt Carrier Group With Carpenter 158 516446915 Palmetto State ArmoryPremium 5 56 Nickel Boron Bcg With Carpenter 158 Bolt No Logo Palmetto State ArmoryAr 15 M16 Bolt. Mil-Spec w properly staked Grade-8 screws and sealed with Permatex No.

This is the MIL-SPEC alloy used for the bolt. Ar 15 full Auto 556 BCG wCarpenter 158 Bolt 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. 9310 Alloy Steel High Hardness or Mil-Spec Carpenter 158 Carrier.

The material is clean with negliable elements in the make up that are detrimental to the fatigue life. They really have disappointed me over the last 6 months sending the. Cut from Carpenter 158 steel.

The original material selection for the bolt was found to have inadequate service life. It can operate happily within the confines of the enviromental requirements imposed by the application and has a very low deformation of the parts as they. Dumb ass assumption on my part.

158 steel is the mil-spec steel used for fabricating the bolt itself. The truth is the standard Mil-spec C-158 Carpenter 158 bolt has a number of factors limiting its performance not the least of which is that the life expectancy of such bolts is only about 6000 rounds. It still pisses me off though and I still feel cheated a little by PSA and this bolt.

Trusted China Suppliers Verified by SGS. Bolt for M-15M-16 or M-4 machined from either Mil-Spec Carpenter 158 or 9310 steel shot peened for increased strength per Mil-Spec. Properly heat treated shot peened.

HPT High Pressure Batch Tested and MPI Magnetic Particle Inspected. Whether its a new build or simply a spare part you can be sure that your White Label bolt will serve you a lifetime. This type of steel is more expensive than 9310 another popular steel used for the bolt and carrier but it provides the best performance and lifespan for the BCG.

Shot Peened and Case Hardened D2 Tool Steel Firing Pin. Heres the short answer. Bolt Carriers made from 8620 Steel.

Ar 15 full Auto 762x39 BCG wCarpenter 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. Ad Safe Trading Stainless Fasteners on Leading B2B Platform. Includes tool steel extractor with spring and viton O-ring.

With the exception of Carpenter 158 the above numbers are generalizations that can be deviated if the alloy is not normalized or hardened according to specs. A precisely machined and tested part is exceedingly tough and reliable. This question comes up often.

United Defense Ar 15 M15 5 56 223 Carpenter Steel Bolt Head. Machined from solid bar stock C-158 steel heat treated shot peened precision ground and nitride treated by HM our bolts are the perfect addition to your build.

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