CMMG 12.5 Inch 300 AAC Blackout MK4 Upper is for the MK4 Model Semi-Automatic Rifle. WASP treated 4140 chrome moly steel, 1:7 inch twist, 5/8 - 24 threaded with mid length hand guard. F marked front sight base.
CMMGG 12.5 Inch 300 AAC Blackout MK4 Upper Specifications:
- Caliber: 300 AAC Blackout Chamber
- Barrel: 12.5 inch M300 profile barrel, WASP treated 4140 chrome moly steel, 1:7 inch twist, 5/8 - 24 threaded
- Hand Guard: Mid-length
- Sights/Gas Block: F marked frnt sight base
- Bolt Group: M16 bolt group
--All NFA Regulations apply. Please check your local and state laws before ordering. Contact your local ATF Field Office with any NFA questions you may have.--