CMMG Mk4 Upper Receiver Assembly 55BA22C

As a complete upper receiver group, this kit includes the dust cover and forward assist assembly. It readily accepts any standard AR-15 barrel and barrel nut. The black anodized aluminum construction is hard wearing, and the flat top upper gives users plenty of space to mount sights and optics.

Features and Specifications:

• Mil-Spec design
• Forged 7075-T6 aluminum
• M4 Feed ramps
• Type III hard anodized finish

Includes:

• Forward Assist Assembly
• Dust Cover 

Manufacturer Part #: 55BA22C