CMMG Introduces the Mk4 3GR Rifle

CMMG Mk4 3GR Rifle
CMMG Mk4 3GR Rifle

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
  • MSRP:  $1,399.95
CMMG Lifetime Quality Guarantee
CMMG, Inc. will guarantee its products against defects in material or workmanship.  CMMG, Inc. will repair, replace or substitute part(s) (at CMMG, Inc. discretion) at no charge to the customer if a defect of material or workmanship is found. All service work must be carried out by CMMG, Inc.

About CMMG:
CMMG began in central Missouri in 2002 and quickly developed into a full-time business because of its group of knowledgeable and passionate weapons enthusiasts committed to quality and service. Its reputation was built on attention to detail, cutting edge innovation and the superior craftsmanship that comes from sourcing all their own parts. By offering high quality AR rifles, parts and accessories, CMMG’s commitment to top-quality products and professional service is as deep today as it was when we began.

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    Wild Bill
    Wild Bill

    @CG, Oh yes, we are aware of General Stilwell of the ChinaBurmaIndia theater. He was and remains a hero, but he did not get the nick name Vinegar Joe for no reason, so I have read. I am not sure what General Stilwell has to do with the Mk4 3GR. By the way, what does your CG stand for?


    Hi Guys;

    Has anyone here ever heard of
    a 4-Star US General called :

    ‘Vinegar Joe’ Stilwell.

    His full name is:

    Joseph Warren Stilwell.

    He was a 4 Star General.

    a real Hero to some.