Tromix 458 SOCOM Bolt Carrier Group Premium Nitride BCGThis is a 458 Socom bolt carrier group with a genuine Tromix brand bolt assembly. It is highly recommended to use this bolt with 458 Socom uppers/barrels to eliminate feeding and extraction issues that are common to 458 Socom's that do not use this bolt. The Tromix 458 Socom bolt assembly has MANY specific, unique and purposeful features about it that other brand 458 Socom bolts do not have. These features are absolutely critical for reliable, consistent performance in 458 Socom uppers. Bolt
group (full auto version) for your AR15, M16, or M4. Nitride Salt Bath
treated on exterior and interior carrier. This
M16/M4 carrier includes the properly staked Nitiride treated gas key.
Gas key is heat treated per USGI specifications. Gas key is secured to
carrier via USGI domestic mfg Grade 8 fasteners and properly staked per
Mil-Specs. These properly hardened parts insure a strong staking and
proper gas system functioning.