M16 / M4 CHROME LINED BLACK PHOSPHATE COMPLETE BOLT CARRIER GROUP
Phase 5’s Mil-spec M-16 / M4 bolt carrier features a heat treated and chrome lined inner with a black phosphate coating. The complete bolt carrier group includes cam pin, firing pin, gas key, and bolt.
- Caliber: 5.56 NATO / .223 Rem / 300 BLK
- Material: 9310 Steel Bolt
- Finish: Phosphate
- Profile: M-16