KNS Precision Bolt Catch Retaining Pin AR-15/M16 Black

The KNS Precision Bolt Catch Retaining Pin is a drop-in replacement for the factory roll pin on mil-spec AR-15 and M16 lower receivers. It is machined from steel and finished in black nitride to resist wear and corrosion, and it installs in seconds without the need for a hammer or punch set.

The pin seats inside the bolt catch and is held in place by three C-clip retainers that apply spring tension for a firm, rattle-free fit under recoil. Designed to drop into any standard mil-spec lower, it is a popular upgrade for builders and armorers who want to skip chasing factory roll pins across the bench.

Proudly made in the USA, this retaining pin is a smart addition to any AR build or armorer’s bench. Each package includes one bolt catch retaining pin and three C-clip retainers.