12.7×42 AR-15 Bolt Carrier Group (BCG)

12.7×42 AR-15 Bolt Carrier Group (BCG)

Product Specs:

• 12.7×42 Caliber
• M16 cut
• 9310 steel carrier
• Carpenter 158 steel bolt
• 4140 steel extractor
• MIL-SPEC O-ring
• MIL-SPEC gas rings
• 4140 steel cam pin
• 8740 steel firing pin with hard chrome finish
• Magnetic particle inspected
• Proudly made in the U.S.A.