- .225/5.56 NATO AR15/M16 Full Auto BCG
- Engineered to reduce carrier tilt and friction inside upper receiver
- Materials, tolerances, and coatings are used to meet or exceed milspec standards
- 9310 Hardened Bolt, Shot peened
- 8620 Billet machined and hardened carrier
- 4130 steel gas key -- Grade 8 hardware with proper staking methods
- Weight 11.4oz
- Black Nitride Finish
- 100% made in the USA
- Limited Lifetime Midwest Industries Warranty
