The 100 Series features the beloved A2 pistol grip, a CMMG Anti-Jam charging handle, and a CMMG RML 15 M-Lok handguard. Chambered in 5.56 X 45mm, this upper group is ready for your next AR build.
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.
All of our Upper Groups come complete with BCG.
All Products come with CMMG’s Lifetime Quality Guarantee.
TECHNICAL SPECIFICATIONS
PLATFORM | MK4 |
CALIBER | 5.56X45MM |
OPERATING SYSTEM | DIRECT IMPINGEMENT |
BARREL LENGTH | 12.5 |
BARREL TWIST | 1:7 |
BARREL CONTOUR | MULTI ROLE |
BARREL MATERIAL | 4140CM, SBN |
BARREL TWIST | 1:7 |
MUZZLE DEVICE | CMMG A2 COMPENSATOR |
MUZZLE THREAD | 1/2 X 28 |
GAS PORT LOCATION | CARBINE |
GAS BLOCK | 0.750″ NON-ADJUSTABLE |
UPPER RECEIVER | FORGED 7075-T6 AL M4 TYPE UPPER |
HAND GUARD | CMMG RML11 M-LOK |
FINISH | HARD COAT ANODIZED RECEIVERS AND HAND GUARD (CAN BE UPGRADED TO CERAKOTE) |
CHARGING HANDLE | CMMG MIL-SPEC |
WEIGHT | 3.13 |
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