CMMG Upper Receiver Assembly, Mk3/.308WIN | Cerakote Finish

Build your AR-10 platform your way with the CMMG Lower Receiver Sub-Assembly – Mk3 / .308 WIN. Designed around the proven DPMS LR308 Gen 1 high-pattern platform, the Mk3 lower provides compatibility with some of the most popular and widely available .308 AR components on the market.

Finished in your selected Cerakote color, this receiver combines custom appearance with increased resistance to wear and corrosion for a premium finished build.

The Mk3 platform delivers AR-15 style modularity, allowing builders to customize their setup with a wide range of available parts. Pair it with a standard Mk3 Lower Parts Kit for a straightforward build or upgrade with a Gunbuilder’s Lower Parts Kit and compatible AR-10 drop-in trigger for a more custom setup.

The receiver also accepts many familiar AR-15 accessories including compatible pistol grips and can be completed with your preferred buffer tube and stock assembly.

Features

• CMMG Mk3 Lower Receiver Sub-Assembly
• Designed for .308 Winchester / AR-10 platforms
• DPMS LR308 Gen 1 high-pattern compatibility
• Available in multiple Cerakote finishes
• AR-15 style modularity
• Compatible with standard AR-15 pistol grips
• Supports AR-10 drop-in trigger upgrades
• Accepts LR308 / SR-25 pattern magazines
• Excellent foundation for custom AR-10 builds

Build Notes:

• Lower parts kit sold separately unless otherwise noted
• Buffer tube and stock assembly sold separately
• Always verify compatibility before selecting build components

PLEASE NOTE:

• This item MUST ship to a valid FFL dealer.
• FFL information is required before shipment.
• Lowers are NOT eligible for free shipping due to increased shipping and handling requirements.
• All items purchased with the lower will ship to the designated FFL. Please place a separate order if additional items should ship elsewhere.
• Cerakote colors may vary slightly due to application and curing process.