5.56 NATO / 300BLK Bolt Carrier Group - Nitrided
- 9310 Bolt Shot Peened and MPI
- 8620 Full Auto Profile Carrier
- Hardened 4130 Gas Key
- Grade 8 Hardened Fasteners - Staked
- Salt Bath Nitride Finish Throughout
LIFETIME WARRANTY - We offer a lifetime, no questions asked, warranty on our BCGs. If it fails, send it in and we will replace it.