NBS AR-15 Bolt Carrier Group - 6.5 Grendel Nitride

The NBS M16 bolt carrier group is the perfect BCG for your next build. Properly built, no corners cut, 100 percent US made. With our lifetime guarantee, you can't go wrong.M16 / AR15 6.5 Grendel 8620 M16 style carrier H&M Black Nitride finish Properly heat treated Final grind before plating 9310 6.5 Grendel bolt Heat treated Shot peened H&M Black Nitride finish MPI 4140 billet gas key H&M Black Nitride Finish Properly seated with Grade 8 fasteners Properly staked to ensure reliability 4140 Cam Pin nitride treated for wear resistance Billet Machined Extractor Machined from solid 4140 bar stock, heat treated and shot peened Phosphate coated for reliable extraction Extractor insert included O-Ring included Firing pin precision machined from 17-4 H-900 Stainless Steel 100% USA Made