Strike Industries Multi-Function End Plate & Anti-Rotation Castle Nut Steel Black - AR-15/AR-10

Upgrade your lower receiver with the Strike Industries Multi-Function End Plate and Anti-Rotation Castle Nut, a steel, ambidextrous combo designed for Mil-Spec AR-15 and AR-10 (ArmaLite/DPMS pattern) platforms. The reversible Multi-Function End Plate features integrated anti-rotation QD sockets and sling loops, letting you orient the mounting hardware to either side of the receiver for true ambidextrous sling and sling-mount support.

A built-in set screw in the end plate simplifies takedown pin spring installation, while the included Anti-Rotation Castle Nut mates directly with the end plate to lock the castle nut in place, eliminating the need for traditional staking or peening. Together, the pair keeps your buffer tube and end plate securely indexed under hard use, with no slipping or rotation over time.

Both components are machined from steel and finished in a low-glare black coating to match factory receivers. When installing, torque the castle nut to no more than 35 ft/lbs for proper fit and function.