Ultimate Forward Assist (Solid). The UFA-S is precision swiss lathe turned & manufactured from certified 4140 Cr-Mo steel, giving improvements to strength, corrosion resistance and durability over the original materials.
Parts are all heat treated to 48-52 Rc (Rockwell C).
In addition all parts are QPQ (Quench Polish Quench) Nitrided for improved corrosion resistance and enhanced lifespan.
The main Plunger spring is manufactured with the improvement of Stainl