This .22 LR/Mk9 upper receiver assembly is made from forged 7075-T6 aluminum with a Type III hard anodized finish, and ships with a forward assist, dust cover and deflector.
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 | FORGED 7075 T6 AL |
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