The Mk4 K is CMMGs primary short barreled rifle. The Mk4 K includes the RKM11 KeyMod free floating hand guard. The barrel is a nitrided 4140 CrMo steel 12.5 barrel available in both 5.56x45mm and 300 AAC Blackout. Each rifle includes Magpul MOE pistol grip and trigger guard, along with a magazine and CMMGs lifetime quality guarantee.
Specifications:
- Caliber: 5.56mm/300 BLK
- Barrel: 12.5 medium weight multi-role profile
- Muzzle: A2 comp., threaded 1/2-28
- Hand Guard: CMMG RKM11 KeyMod hand guard
- Furniture: Magpul MOE pistol grip
- Receivers: Forged 7075-T6 AL M4 type upper, AR15 type lower
- Trigger: Single stage mil-spec style trigger
- Weight: 6 lbs (unloaded)
- Length: 29 (stock collapsed)
- Gas Port Location: Carbine