When modularity, affordability, and quality are all important the Mk4 T is the rifle of choice. The Mk4 T introduces CMMG's RKM series of KeyMod free float hand guards. Either a 416 stainless or nitrided 4140 CrMo steel barrel in a medium taper profile are offered for both 5.56mm and 300 BLK. The 22LR and 9mm models feature a nitrided 4140 CrMo M4 profile barrel.
- Caliber: 9mm - Barrel: 16.10?, M4 profile, 4140CM, SBN - Rate of Twist: 1:10 - Muzzle: A2 comp., threaded 1/2-36 - Hand Guard: CMMG RKM11 KeyMod hand guard - Furniture: A2 pistol grip, M4 butt stock with 6-pos mil-spec receiver extension - Receiver: Forged 7075-T6 AL M4 type upper, AR15 type lower - Trigger: Single stage mil-spec style trigger - Length: 32?" (Stock Collapsed) - Weight: 6.30 lbs (Unloaded)