Midwest Industries, Enhanced Bolt Carrier Group, Black Nitride

ENHANCED BLACK NITRIDE BOLT CARRIER GROUP

• .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