CMMG Resolute MK4 Upper Group 5.56x45 14.5" P&W - 55B360B-AB

CMMG Resolute MK4 upper receiver assembly chambered in 5.56x45 NATO with a 14.5" pinned and welded barrel. This upper group does not include a bolt carrier group or charging handle, allowing builders to select their preferred components. Compatible with standard AR-15 platforms and features the Resolute MK4 design for enhanced modularity and performance.