B5 Systems

Built For 3-Gun – CMMG Introduces The Mk4 3GR

Fayette, MO — The Mk4 3GR was developed specifically for the 3-Gun Competition, where quick-handling for both short and long shots is a necessity. Featuring a smooth Geissele Automatics SSA® 2-stage trigger, a lightweight KeyMod hand guard and an accurate 18-inch 416 stainless steel barrel, the Mk4 3GR has the fit, feel and function to make it an ideal rifle for the fast-paced action of 3-Gun Competition.

The Mk4 3GR is chambered in 5.56x45mm NATO and sports an 18-inch 416 stainless steel medium taper profile barrel with a 1:7 inch twist. It is equipped with a CMMG SV muzzle brake, Geissele Automatics SSA 2-stage trigger and a Magpul MOE® pistol grip, trigger guard and rifle butt stock. Each rifle also comes with a 30-round Magpul PMAG®.

The Mk4 3GR includes an RKM14 KeyMod hand guard with a 1913 Picatinny rail on top. The KeyMod slots are found at the 3, 6 and 9 o’clock positions and offer shooters a low-profile mounting alternative to the M1913 Picatinny rail. For accessories that are not yet KeyMod compatible, users can purchase a separate CMMG 5-slot Picatinny adapter rail that can be easily attached to any of the KeyMod slots for optimal placement of the accessories.


CMMG Mk4 3GR Specifications:
Caliber: 5.56x45mm NATO
Barrel: 18” Medium Weight Taper Profile
Muzzle: CMMG SV muzzle brake, threaded ½-28
Hand Guard: CMMG RKM14 KeyMod Hand Guard
Receivers: Forged 7075-T6 AL M4 Type Upper, AR15 Type Lower
Trigger: Geissele Automatics SSA 2-Stage Trigger
Furniture: Magpul MOE Pistol Grip, MOE Rifle Butt Stock
Weight: 7 lbs. (unloaded)
Length: 38”
Magazine: 30-round Magpul PMAG



2 Responses to “Built For 3-Gun – CMMG Introduces The Mk4 3GR”

  1. Stefan S. says:

    Yawn!…It isn’t a Noveske

  2. AbnMedOps says:

    So…Three-gun matches, which were originally conceived to develop and test shooting skills and equipment intended to for actual combat, are now infiltrated with “tactical” sporting goods intended simply to win matches and trophies? Kinda sounds like IPSC all over again.