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- 4140 Steel gas key DLC Coated
This is a Mil-Spec bolt assembly with enhanced features for those looking to complete a bolt carrier group
- 9310 Vac-Arc Steel Bolt Nickel Boron Coated
- NiB 9310 Steel Bolt
SPECS: Fits - DPMS pattern 308 rifles
AR/15M16 - 5.56/223 Bolt Carrier Group Titanium Nitride 223bcg - 4140 Steel gas keyPrime Weaponrys M16 Titanium Nitride Bolt Carrier Group, ready for installation. The bolt is 5. 56 223. Titanium Nitride finish provides a unique look, while provide excellent lubricity, hardness and corrosion resistance. Carrier is made with 8620 hardened steel and the bolt is made from 9310 Vac Arc Premium Carburizing Steel which has a high core hardness and high fatigue strength. Gas Key is properly staked, and bolt is magnetic particle tested.
