CMMG ZEROED LPK MK3 – .308 AR Lower Parts Kit

The CMMG ZEROED LPK MK3 is a complete lower parts kit engineered for .308 AR-pattern rifles, specifically CMMG's MK3 platform and compatible large-frame AR builds. This kit includes all the small components needed to complete a stripped lower receiver—trigger assembly, hammer, disconnector, springs, pins, detents, selector, and magazine release. It's built for builders who want a functional, no-frills parts set from a manufacturer known for precision machining and quality control.

All components are mil-spec dimensioned and machined from hardened steel or mil-spec polymer where appropriate. Finish is standard black oxide on metal parts. Installation requires basic armorer tools and knowledge of AR-pattern assembly—this is a drop-in kit for experienced builders, but first-timers should consult a qualified gunsmith or detailed build guide. The kit does not include a pistol grip or trigger guard, which are typically selected separately based on shooter preference.

• Part Type: Complete Lower Parts Kit (less grip and trigger guard)
• Compatible Firearms: CMMG MK3, .308 AR-pattern rifles
• Material: Hardened steel, mil-spec polymer
• Finish: Black oxide
• Installation: Drop-in for experienced builders; gunsmith recommended for first-time assemblers
• Includes: Fire control group, selector, magazine release, bolt catch, pins, springs, detents (excludes pistol grip and trigger guard)