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CMMG Mk4 S Centerfire Rifle

Item # 935868
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Will ship from vendor in 3 - 5 days.

Additional Information:

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  • To buy online and deliver to a Gander Mountain store or an Independent Firearms Dealer, simply add this item to your cart. Click here for additional details.
  • Firearms shipping charge of $25.00 per item.
  • You must be at least 18 years old to purchase this item. State and local laws may vary.
  • Additional discounts do not apply.


  • 416 Stainless Steel Medium Taper Barrel

  • RKM14 KeyMod Free-Float Handguard

  • 6-Position Collapsible Stock

  • Full-Length Picatinny Top-Rail

  • 30-Round Magazine Included

Product Summary

The Mk4 S is the perfect rifle for the tree stand or target range. The Mk4 S utilizes an 18″ 416 stainless steel medium taper barrel chambered in 5.56x45mm NATO and CMMG’s RKM14 KeyMod handguard. The KeyMod handguard is ready to accept any number of the sling mounts, bi-pods, and other KeyMod compatible accessories making the ultimate in versatility and modularity. The barrel features an A2 compensator, 1/2-28 threads, and a 1 in 7" twist. The M4 buttstock has 6-positions of adjustment and a mil-spec receiver extension. The receiver is made up of a forged 7075-T6 AL M4-type upper with an AR15-type lower. A full-length Picatinny top-rail provides ample space for scopes, sights, or lasers. A2 pistol grip. Single stage mil-spec trigger. 30-round magazine.

Model Mk4 S
Type Centerfire Rifle
Action Semi-Auto
Caliber .223 Rem./5.56 NATO
Barrel Length 18"
Weight 6.7 Lbs.
Sights Full-Length Picatinny Top Rail
Finish: Stock Matte Black Synthetic
Finish : Barrel & Receiver Stainless Steel/Black Anodized
Trigger Single Stage
Safety 2-Position Thumb
Capacity 30 + 1


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&& CMMG Mk4 S Centerfire Rifle

Item # 935868


Will ship from vendor in 3 - 5 days.

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Item #1005454
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