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  • CMMG Mk4 S



Market types:


Rifle type:

AR Type, Semi-automatic


.223 Rem

About Product

The Mk4 Sporter is perfect for hunting and target shooting. Equipped with the new RKM14 KeyMod free floating hand guard, it’s ready to except any number of sling mounts, bi-pods and other accessories. With a bead blasted matte finish 416 stainless steel 18” barrel that’s not too heavy to carry in the field but is still accurate and lethal. The rifle includes CMMG’s well renowned mil spec style trigger and a mil-spec 6 position adjustable stock. Each rifle includes a Magpul PMAG 30rd magazine, owner’s manual and CMMG’s lifetime guarantee. Caliber: 5.56mm. Barrel: 18” medium weight tapered profile. Muzzle: A 2 comp., threaded 1/2-28. Hand Guard: CMMG RKM14 KeyMod hand guard. Upper Rcvr: Forged 7075 T-6 AL M4 type. Lower Rcvr: Forged 7075 T-6 AL AR 15 type. Trigger: Single stage mil-spec style trigger. Pistol Grip: A 2 pistol grip. Butt Stock : M 4 butt stock with 6-pos mil-spec receiver extension. Weight: 6.5 lbs (unloaded), 7.5 lbs (loaded w/30rd PMAG). Length: 35” (stock collapsed), 41” (stock extended). 

Model: Mk4 S
Manufacturer: CMMG Inc.
Item #: 55A66E1
Action: Semi automatic
Caliber: 223 Remington (5.56×45mm NATO)
Barrel length: 18"
Barrel finish: Matte Stainless
Barrel type: Round
Rate of twist: 1 in 7"
Stock type: Expandable
Stock material: Polymer
Stock finish: Black
Butt: Plastic
Overall length: 35 - 41"
Sights: BUIS
Trigger: Single stage mil-spec style
Magazine capacity: 30
Magazine type: Detachable Box
Weight: 6.5 lbs.
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