Description
Our bolt carrier group (BCG) is the lifeline of your AR-15. Designed for AR-15 and M16 builds, this group features high-end retaining and firing pin, gas key, and expert assembly, machined from 9310 alloy and laser engraved. The E2 bolt carrier group works better and provides longer lasting performance for your rifle build.
BCG Includes:
Bolt precision machined from 9310 alloy; carburized/case hardened & shot peened
Ultrasonically cleaned and Nitrided
Extractor, machined 4140 Tool steel alloy, hardened and Nitrided
Extractor Pin, precision machined and ground AMS6440/52100 Bearing grade steel retaining pin
Extractor Spring, 5 coil, ASTM Grade A 228 wire stock, stress relieved, Tensile Strength of 393,000 PSI Max, 80 Durometer Per AMS-R-6855 black insert
Extractor Spring O-Ring, Viton (FKM) Fluoropolymer Elastomer
Ejector, S7 shock resistant tool steel alloy, hardened, shot peened per ASTM B851/SAE AMS2430, manganese phosphate
Ejector Spring, ASTM Grade A 228 wire stock, heat treated, stress relieved – Tensile Strength of 376,000 PSI Minimum
Gas Rings, Steel Corrosion Resistant Per AMS 5906 – X3
Carrier machined from 8620 alloy, full auto profile, heat treated, ultrasonically cleaned and Nitrided
Gas Key machined from 4130 chromoly steel alloy, heat treated and Nitrided
Socket Cap Head Screw, steel, grade 4037 per ASTM, heat treated & manganese phosphate 2x
Gas Key is installed with Permatex aviation gasket sealer, torqued to 55-foot pounds, pneumatically steaked and break away tests performed to spec
Cam Pin, precision machined 4340 chromoly steel alloy, heat treated and Nitrided
Firing Pin, precision machined 8740 steel alloy, heat treated, precision ground & hard chrome plate
Firing Pin Retaining Pin, carbon steel ASTM A510, heat treated & manganese phosphate
All material, components and packaging made in the USA
