M16 / M4 Bolt Carrier Group (BCG-M16)
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.
Specifications:
- Caliber: 5.56 NATO / .223 Rem / 300 BLK
- Material: 9310 Steel Bolt
- Finish: Phosphate
- Profile: M-16
Heat treated, chrome lined carrier and gas key.
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