The CMMG Mil-Spec Lower Parts Kit for .308 Win Mk3 (brand part no. 38CA6DC) organizes the hardware for a .308 Winchester Mk3 lower build into four color-coded bags, making it easier to keep parts sorted during assembly. CMMG built this kit to mil-spec dimensions specifically for the larger Mk3 lower pattern rather than a standard AR-15 kit, which matters for correct fit on a .308-chambered build. The clear bag alone contains the .308 takedown pin and .308 receiver-specific hardware, a small detail that shows the kit was engineered for this platform rather than repackaged from a smaller-caliber kit.

Key Specifications

• Chambered for .308 Winchester/7.62 NATO on the Mk3 lower receiver pattern.
• Organized into 4 color-coded bags for easier sorting during a build.
• Package length of approximately 10.7 inches.
• Shipping weight of approximately 0.5813 pounds.
• Manufactured by CMMG, a long-established name in AR-pattern components.
• Ships as a complete small-parts kit rather than individual loose pieces.
• Color-coded bagging is intended to speed up a first-time Mk3 lower build.
• CMMG bags this kit specifically to speed up first-time Mk3 lower assembly.

Frequently Asked Questions

How is this kit organized? Into 4 color-coded bags to keep parts sorted during your build.

What platform is this kit built for? The .308 Winchester Mk3 lower receiver pattern specifically.

Buy the CMMG Mil-Spec Lower Parts Kit for .308 Win Mk3

Organize your .308 Mk3 build with genuine CMMG parts. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse our full AR lower parts kit selection.