The Aero Precision Bolt Carrier Group is a high-quality addition to your AR-15 build. Finished with durable MIL-SPEC manganese phosphate with chrome-lined internal and gas keys. A properly staked gas key prevents gas leakage that can lead to short stroking. Each assembly is magnetic particle inspected to ensure it is free from defects that can lead to premature failures. MIL-SPEC dimensions ensure correct component function and reliability.

Features:

• Laser engraved Aero Precision "A" logo
• Machined from 8620 tool steel (carrier) and carpenter 158 steel (bolt)
• Forward assist serrations
• MIL-SPEC phosphate coating
• Chrome-lined gas key and firing pin channel
• 5.56 NATO bolt is shot peened and magnetic particle inspected
• Weight 11.52 oz