Cross Armory CRPP Pin Pal Mil-Spec AR-15/M4 223 Rem/5.56 NATO 4140 Steel Black Melonite

The Cross Armory CRPP Pin Pal is a front takedown pin replacement system designed to reinforce the forward pivot point of standard AR-15 and M4 lower receivers. It provides a more durable pivot interface for the upper and lower receiver, reducing friction and wear over repeated takedown cycles.

The kit includes a front takedown pin replacement paired with a locking nut, both machined from 4140 ordnance steel for extreme durability and finished in Black Melonite. The pre-lubricated bearing can be press-fit without permanent modification to the receiver, making it a drop-in upgrade for any standard AR-15/M4 configuration. It is also a popular California-compliant component for builders working within feature-restricted configurations.

Purpose-built for the 223 Remington / 5.56 NATO AR platform, the Pin Pal replaces the standard front takedown pin with a hardened bearing-style assembly that holds up under hard use, giving you smoother receiver articulation and longer service life.