MidwayUSA Exclusive Brand Warranty
- Chambered for 12.7x42mm
- Machined to Mil-Spec Standards
- Properly Staked Gas Key
- Drop-In Ready
- Black Nitrite Finish Carrier
- Parkerized Finish Bolt
The AR-STONER™ 12.7x42mm Bolt Carrier Group is a great option for your next AR-15 build. Chambered in the highly effective 12.7x42mm , this BCG is machined to strict military standards. State of the art magnetic particle testing ensures the assembly is free of imperfections and will function flawlessly. Featuring a staked gas key, the AR-STONER™ Bolt Carrier Group is drop-in ready.
Note: Upon installation, headspace should be verified by a qualified gunsmith.