Building an AR-10 from the ground up demands quality parts that work together seamlessly—and the CMMG AR-10 MK3 Lower Parts Kit is exactly what you need to get your .308 rifle running. This complete AR-10 MK3 assembly kit includes all the small components necessary to finish your lower receiver, saving you the headache of sourcing individual pins, springs, and controls separately. Whether you're a seasoned builder customizing your next precision rifle or stepping into AR-10 territory for the first time, this kit gives you everything in one package.

The kit comes color-coded for easy identification during assembly—a thoughtful detail that makes the build process faster and more organized. You get takedown pins and their detents, bolt catch assembly, hammer and trigger group components, disconnect spring, safety selector with detents, magazine catch system, buffer retainer, and your pistol grip screw. That's the full lower parts assembly without any guessing or missed steps.

CMMG has built their reputation on making AR platform parts that work. This MK3 kit is engineered for their AR-10 lower receivers but reflects the kind of attention to function you'd expect from a brand that understands what shooters actually need. Whether you're building a hunting rifle, a target gun, or a long-range precision platform, a properly spec'd lower parts kit is the foundation that makes it all come together.

Building an AR-10 from the ground up demands quality parts that work together seamlessly—and the CMMG AR-10 MK3 Lower Parts Kit is exactly what you need to get your .308 rifle running. This complete AR-10 MK3 assembly kit includes all the small components necessary to finish your lower receiver, saving you the headache of sourcing individual pins, springs, and controls separately. Whether you're a seasoned builder customizing your next precision rifle or stepping into AR-10 territory for the first time, this kit gives you everything in one package.

The kit comes color-coded for easy identification during assembly—a thoughtful detail that makes the build process faster and more organized. You get takedown pins and their detents, bolt catch assembly, hammer and trigger group components, disconnect spring, safety selector with detents, magazine catch system, buffer retainer, and your pistol grip screw. That's the full lower parts assembly without any guessing or missed steps.

CMMG has built their reputation on making AR platform parts that work. This MK3 kit is engineered for their AR-10 lower receivers but reflects the kind of attention to function you'd expect from a brand that understands what shooters actually need. Whether you're building a hunting rifle, a target gun, or a long-range precision platform, a properly spec'd lower parts kit is the foundation that makes it all come together.