United Defense AR-15 Bolt Carrier Group for 12.7X42 (.50 Cal)
The United Defense AR-15 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.
Caliber / Gauge: 12.7X42 (.50 Cal/.50 Beowulf Compatible)
Carrier Style: Standard
Bolt Finish: Parkerized
Bolt Material: 9310 Steel
Carrier Finish: Black Nitride
Magnetic Particle Inspection: Yes