CMMG Mk3 .308 Lower Receiver, Armor Black

CMMG Mk3 .308 Lower Receiver

The CMMG Mk3 lower receiver is your foundation for building a modern .308 AR-platform rifle. Based on the proven DPMS LR308 Gen 1 high pattern design, this receiver opens the door to one of the most versatile and popular AR10 platforms available.

Compatibility & Modularity

Wide Parts Compatibility

• Engineered around the DPMS LR308 Gen 1 high pattern
• Works with the most common and popular .308 AR parts on the market
• Accepts LR308 and SR-25 pattern magazines
• Supports AR-15 style pistol grips and components

Build Flexibility

• Pair with CMMG's Mk3 Lower Parts Kit for a straightforward build
• Upgrade with CMMG's Gunbuilder's Lower Parts Kit for customization
• Install AR10 drop-in triggers for enhanced performance
• Finish with CMMG Buffer Tube and Stock Kits

Quality Construction

Manufactured by CMMG with attention to precision and durability, this lower receiver is finished in Armor Black for a professional appearance. Whether you're a seasoned AR builder or starting your first .308 platform rifle, the Mk3 lower receiver provides the reliability and modularity serious shooters demand.

Start your build with confidence—the CMMG Mk3 is where precision meets versatility.