• M16 Style Carrier Machined from 8620 Steel
  • Heat Treated
  • Final Grind Before Plating
  • Polished Nickel Boron Coating (NiB-X)
  • 5.56/.223 Bolt Machined from 9310 Steel

Full details and secure checkout: https://3crtactical.com/polished-nickel-boron-bolt-carrier-group-bcg-5-56-223-300blk-316518/?utm_source=armslist&utm_medium=referral&utm_campaign=listing