CMMG Upper Receiver Assembly, Mk4, Black (55BA22C)

CMMG’s Upper Receiver Assembly is made from forged 7075 T6 AL, and ships with dust cover and forward assist assembly installed. The Mk4 platform accepts standard AR15-style magazines, and is the most versatile of the CMMG platforms, especially with the .22 LR, 5.7x28mm (Conversion), and 9mm conversions.

NOTE: Requires charging handle, barrel, handguard, gas block, muzzle device, gas tube and BCG (Bolt Carrier Group) to complete.