The Phase 5 bolt carrier group is a complete, ready-to-run AR-15 BCG built on an M16-profile (full-auto) carrier and chambered support for 5.56 NATO / .223 Remington. The heavier M16-profile carrier is legal in semi-automatic rifles and adds dwell mass for reliable cycling.

Features:

• Complete AR-15 bolt carrier group
• M16-profile (full-auto) carrier — legal in semi-auto AR rifles
• 5.56 NATO / .223 Remington
• Bolt machined from Carpenter 158 steel
• MPI (magnetic particle inspected) and HPT (high-pressure tested)
• Black nitride finish

Designed for standard AR-15 platforms chambered in 5.56/.223.