Dirty Bird Industries Enhanced Bolt Carrier Group .223/5.56 - Black Nitride

Dirty Bird Industries Enhanced Bolt Carrier Group .223/5.56The Dirty Bird Enhanced Bolt Carrier Group for .223/5.56 features a unique carrier design with practical improvements in two key areas: Strategically relocated load-bearing surfaces reduce carrier tilt/can't during recoil, thus increasing reliability and longevity. Additional wall thickness in the gas exhaust port area for added strength and rigidity.The 9310 Bolt is machined to mil-spec dimensions, and then the external surfaces, including the lugs, are CNC ground after the heat treating process to ensure a very precise fit. The bolts themselves feature the same Black Nitride finish as the carrier and are High-Pressure (HP) Tested and Magnetic Partial Inspected (MPI) in accordance with Mil-STD-1816 specifications.