The CMMG Zeroed Lower Parts Kit, Mk3 (brand part no. 38CA62B) provides the internal components needed to complete a CMMG Mk3 or most LR-308-pattern lower receivers. CMMG packages the kit’s parts in convenient color-coded packets, taking the guesswork out of sorting small springs, pins, and detents during assembly. Compatibility is built specifically around CMMG’s own Mk3 receivers as well as most other LR-308-type lowers on the market, giving builders flexibility beyond just CMMG-branded parts. For a first-time .308 AR build or a lower rebuild, a complete, well-organized kit like this cuts down on trips back to the parts bin mid-build.

Key Specifications

• Packaged in color-coded packets that simplify sorting parts during assembly.
• Built for compatibility with CMMG Mk3 and most LR-308-type lower receivers.
• Classified as a complete lower parts kit, covering the internal components needed to finish a lower build.

Frequently Asked Questions

What lowers is this kit compatible with? CMMG Mk3 receivers as well as most other LR-308-pattern lower receivers.

Does the color-coding make assembly easier? Yes, parts are packaged in color-coded packets specifically to simplify sorting and installation during a build.

Buy the CMMG Zeroed Lower Parts Kit, Mk3

Finish an LR-308-pattern lower build without hunting down each small part separately. Browse Schaefer Defense’s AR lower parts kits and order from our Lubbock, Texas gun shop for fast shipping.