CMMG ZEROED LPK AR15

Description

Building an AR-15 lower from scratch means sourcing and fitting a dozen small parts that each have their own tolerances, orientations, and failure modes if assembled incorrectly. CMMG’s ZEROED Lower Parts Kit addresses that friction directly: every component arrives sorted into color-coded packets, which reduces the chance of mixing up springs or losing a detent before it ever sees a receiver. All parts are made in the USA and meet or exceed mil-spec standards, so they fit standard AR-15 and Mk4-pattern lowers without modification.

Where this kit goes further than a bare mil-spec collection is in the upgraded components CMMG has replaced outright. The ZEROED Extended Bolt Catch gives a larger surface to sweep during chamber checks and malfunction drills — useful if you run gloves or simply prefer a more deliberate interface. The ambidextrous safety selector is adjustable between 60° and 90° throws, which matters if you prefer a shorter arc for faster engagement or a longer travel for deliberate positive stops. The ambi magazine catch and extended release button serve left-handed shooters or anyone who has trained a finger placement that doesn’t align with the standard right-side-only arrangement. Heavy-duty pivot and takedown pins replace the standard hardware, which tends to be the first thing builders swap after noticing slop in the assembled lower. The included ZEROED pistol grip rounds out the package, so you’re not hunting for a separate grip to complete the lower.

The kit does not include a stock, brace, or buffer assembly, so pair it with a receiver extension kit before calling the build complete. Installation hardware is included throughout.