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AR-15/M16 Bolt Carrier Group Assembly

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$99.99
AR-15 Bolt Carrier Group Assembly

AR-15/M16 Bolt Carrier Group, BCG is a heart and soul of your AR-15 when it comes to Bolt Carrier Groups you want the top shelf quality BCG. Lucky for you Ormond Arms has quality machined mil spec bolts.

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