Aero Precision AR15 5.56 Bolt Carrier Group - Black Nitride

Features:

• M16-cut carrier
• Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt)
• Carrier has forward assist serrations
• Black Nitride Finish - advanced lower friction coating that minimizes the need for lubricants and cleaning
• Properly staked gas key
• Shot peened
• HPT tested/MPI marked
• Black o-ring insert on extractor
• High quality BCG