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- 9310 Vac-Arc Steel Bolt
It is heat treated and hardened to USGI Standards for increased strength
Grade 8 Hardened Fasteners Nitride QPQ
High quality beanie
AR/15M16 - 5.56/223 Bolt Carrier Group Titanium Nitride 223bcg - 9310 Vac-Arc Steel BoltPrime 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.
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