BCG Includes:

• Bolt precision machined from 9310 alloy; carburized/case hardened & shot peened
• Ultrasonically cleaned and manganese phosphated – 2 hours accelerated Salt Spray & 48-hour endurance Salt Spray completed on each lot
• Extractor, machined 4140 Tool steel alloy, hardened with manganese phosphate
• 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