CMMG Mk3 Lower Receiver Sub-Assm .308 WIN Armor Black

The CMMG Mk3 lower receiver sub-assembly in Armor Black provides the foundation for an AR10-style build. Based on the DPMS LR308 Gen 1 high pattern, the Mk3 platform is compatible with many common .308 AR parts and accepts LR308/SR-25 pattern magazines. It is produced from a billet 7075 T6 aluminum lower and finished in standard Cerakote for corrosion resistance.

Key Specifications

• The platform is Mk3.
• The calibers listed are .308 WIN, 6.5 Creedmoor.
• The lower receiver material is Mk3 Billet 7075 T6 Aluminum.
• The finish is Cerakote Standard.
• The trigger guard is Integrated.
• Magazine compatibility is LR308/SR-25 pattern magazines.
• The design is based on the DPMS LR308 Gen 1 high pattern.
• Compatibility includes common .308 AR parts and AR-15 pistol grips.
• Intended for AR10-style builds.

Engineered for builders who prefer a reliable, compatible foundation, the CMMG Mk3 lower receiver delivers billet construction, standard Cerakote protection, and broad parts compatibility to streamline assembly and customization. Its LR308/SR-25 magazine acceptance and DPMS-compatible footprint make it a practical choice for a range of AR10-style configurations, from precision-oriented builds to general-purpose platforms.