KAK AR15 5.56 / .300 Blackout Bolt Carrier Group - Nitride

KAK Industry 5.56 / .300 Blackout Bolt Carrier Group

Machined in house and assembled using only finest steels and components.  KAK Industry takes pride in producing some of the finest AR15 bolt carrier groups available.

• M16 profile carrier machined from aircraft/bearing quality 8620 steel, heat treated, ground to perfection, and nitride treated by H&M BlackNitride
• Bolt is machined from aircraft/bearing quality 9310 steel, heat treated properly, precision ground, and nitride treated by H&M BlackNitride
• Firing pin is machined to the mil-spec print from 8740, precision ground, and chrome plated.
• Nitride treated cam pin
• Machined steel extractor - phosphate coated
• S7 tool steel ejector and extractor retaining pin
• 4130 Gas Key, nitride treated, precision staked using our hydraulic staking machine.
• KAK enhanced carrier key screws- T25 drive, domed top with 50% deeper knurling, grade 8, properly heat treated, made in USA, radiused top allows for staked material to have a greater contact area compared to other designs