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.
TECHNICAL SPECIFICATIONS
PLATFORM | MK4 |
UPPER RECEIVER | 7075-T6 AL M4 UPPER |
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