CMMG's Barrel Sub-Assembly is ideal for building your custom AR-15 upper group. It comes with properly installed M4 barrel extension.
- Twist:
- 1:7"
- Model:
- Barrel Sub-Assembly
- Finish:
- Nitride
- Type:
- Rifle
- Barrel Features:
- M4 Profile
- Caliber or Gauge:
- 223 Remington/5.56 NATO
- Length:
- 16.10"
- Sights:
- None
- Barrel Type:
- Carbine Length
- FireArm:
- No
- Requires FFL:
- False
- Series Description:
- M4
