CMMG 38CA6DC Mil-Spec Lower Parts Kit .308 Win Mk3 Black

The CMMG 38CA6DC Mil-Spec Lower Parts Kit is a complete small-parts package for finishing out or servicing an AR-10 pattern .308 Win lower receiver on the CMMG Mk3 platform. Manufactured to Mil-Spec standards in a durable black finish, this LPK assembles every internal component needed to bring a stripped lower to functional condition in the LR-308 family.

Engineered specifically for the CMMG Mk3 platform, this kit is compatible with most DPMS Gen 1 LR-308 pattern lowers and components, making it equally useful for builders assembling a new AR-10 from the ground up or gunsmiths refreshing worn internals on an existing rifle. The Mk3 receiver family uses larger .308 specific front pivot and takedown pins to handle the pressures of 7.62x51 NATO ammunition, and every part in this kit is cut to those same dimensions and tolerances.

The 38CA6DC includes the .308 takedown pin, .308 receiver pivot pin, takedown pin detents and detent springs, the bolt catch assembly with its roll pin and spring, the magazine catch, magazine catch button and spring, the safety selector with detent and spring, the Mil-Spec trigger and hammer with their pins and springs, and the buffer retainer and spring. Everything is packaged ready to drop into a matching Mk3 or DPMS Gen 1 stripped lower (sold separately).

The Mil-Spec model designation refers to the standard AR-10 / LR-308 trigger group geometry used across the CMMG Mk3 lineup. This kit provides all of the small hardware required to complete or refresh a .308 Win AR-10 lower for reliable semi-automatic function.