A polished Nickle Boron BCG is an exceptional upgrade for your AR-15 that provides and smooth and reliable operation.
Assists in lubricity and combats friction!
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)
- Carrier machined from 8620 alloy, M16 profile, heat treated, Nickel Boron
- Gas Key machined from 4130 chromoly steel alloy, heat treated and Nitrided
- Bolt precision machined from 9310 alloy; carburized/case hardened, shot peened and Nitrided
- 4140 Tool billet steel Extractor alloy, hardened and Nitrided
- Extractor Pin, AMS6440/52100 Bearing grade steel retaining pin
- 5 coil, Extractor Spring, 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
- S7 shock resistant tool steel alloy Ejector, hardened, shot peened per ASTM B851/SAE AMS2430, manganese phosphate
- ASTM Grade A 228 wire stock Ejector Spring, heat treated, stress relieved – Tensile Strength of 376,000 PSI Minimum
- Gas Rings, Steel Corrosion Resistant Per AMS 5906 – X3
- 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
- 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 staked
- Cam Pin, precision machined 4340 chromoly steel alloy, heat treated and Nitrided
