LANTAC USA UFA-S Ultimate Forward Assist 4140 Steel Nitride Black - AR-15/LR-308

The LANTAC USA UFA-S Ultimate Forward Assist is a premium drop-in replacement for the factory forward assist on AR-pattern upper receivers. It is precision Swiss lathe turned from certified 4140 Cr-Mo steel and fully heat treated to 48-52 Rockwell C, giving the UFA-S noticeably smoother plunger action and far greater long-term durability than a standard stamped assembly.

A low-glare Melonite (Black Nitride) finish protects the entire assembly and matches both phosphate and nitrided uppers, while a redesigned spiral retaining pin replaces the factory slotted spring pin to resist shear and accidental push-out during hard use. The oversized, deeply textured pawl and spring-loaded plunger give positive, tactile engagement every time the bolt is manually seated.

The UFA-S is a direct swap for the standard forward assist on AR-15, M16, M4, AR-10, and LR-308 pattern upper receivers, requiring no fitting or modification. Proudly made in the USA.