AIM Bolt Carrier Group BCG Phosphate 5.56 / .223 Chrome Lined MPI

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AIM Bolt Carrier Group BCG. Made in the U.S.A! These are Excellent Quality MPI tested Mil-Spec BCGs, complete and ready to drop in. Ships out Priority Mail with tracking!
  • Shot Peened MPI (Magnetic Particle Inspected) Bolt. 
  • 9310 Bolt Material, 8620 Chrome Lined Carrier and Gas Key. 
  • Full Profile Carrier
  • Properly staked Investment cast gas key hardened to USGI specifications 
  • Gas Key Fastened with Hardened Grade 8 Fasteners. 
  • Extractor O-Ring upgrade with Black Insert. 
  • Fast, free shipping!

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