The CMMG Mk3 lower receiver is just the thing you need to start an AR10 style build. Based on the DPMS LR308 gen 1 high pattern design the Mk3 platform is compatible with the most common and popular .308 AR parts on the market.
Whether you want to keep your Mk3 lower build simple with a Mk3 Lower Parts Kit or switch things up with CMMG’s Gunbuilder’s Lower Parts Kit and an AR10 Drop-In Trigger the Mk3 Stripped Lower features AR-15 like modularity and can even utilize the same Pistol Grips. Check out CMMG's Buffer Tube & Stock Kits to finish out the Mk3 Stripped Lower. Accepts LR308/SR-25 pattern magazines.