Lantac UFA-S Ultimate Forward Assist Assembly Steel Melonite

The Lantac UFA-S Ultimate is a forward assist assembly for AR-15 upper receivers, and it is also listed as fitting LR-308 uppers. It is finished in black Melonite and is machined from 4140 Cr-Mo steel, which the retailer describes as offering improved strength, corrosion resistance and durability over original-style parts.

The parts are heat treated to 48-52 Rc and given a QPQ (Quench Polish Quench) nitride treatment for added corrosion resistance. The plunger spring is 316 stainless music wire with closed-end coils, and the plunger detent spring is zinc-plated music wire. The assembly is retained by a spiral design pin rather than a slotted pin.

• Fits: AR-15 and LR-308 upper receivers
• Color: Black
• Finish: Melonite
• Material: 4140 Cr-Mo steel
• Heat treatment: 48-52 Rc
• Plunger spring: 316 stainless music wire, closed-end coils
• Detent spring: zinc-plated music wire
• Retention: spiral design pin