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ID 1477739 | MPN 55AACF1

CMMG Mk4 B16 Semi-Auto Rifle


CMMG Mk4 B16 Semi-Auto Rifle -All rifles ship with a 30rd magazine and feature CMMGs Lifetime Quality Guarantee.
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It is the customer's responsibility to follow all Federal, State, and Local Laws.
All firearms MUST be picked up by the BUYER (ACTUAL PURCHASER) at your selected Sportsman's Warehouse store or chosen Independent Firearm Dealer (“FFL”).
A valid U.S. and/or state government-issued identification document, or combination of government-issued documents, which reflect the buyer's current residential address, must be presented at the selected store location prior to the completion of any firearm-related paperwork and background check initiation.
The actual purchaser must be 18 years of age or older to purchase rifles and/or shotguns.
The actual purchaser must be 21 years of age or older to purchase handguns and/or firearm receivers, frames, silencers, or pistol-grip only firearms.
Certain states have stricter laws regarding a firearm buyer’s age and Sportsman's Warehouse complies with such requirements.

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CMMG Mk4 B16 Semi-Auto Rifle


CMMG Mk4 B16 Semi-Auto Rifle


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CMMG Mk4 B16 Semi-Auto Rifle -When modularity, accuracy, and quality are all important, the Mk4 B16 is the rifle of choice. The Mk4 B16 features CMMG's RKM11 KeyMod free float hand guard and nitrided bull barrel to maximize shot repeatability.

  • CMMG RKM11 KeyMod hand guard
  • M4 butt stock with 6-pos mil-spec receiver extension
  • A2 pistol grip
  • Single stage mil-spec style trigger


Capacity 30+1
Barrel Length 16.1in
Finish Black
Stock Telescopic Buttscock / CMMG RKM11 KeyMod Handguard
Sights Full Length Picatinny Rail
Weight 7.2lbs
Action Semi Automatic
Cartridge 5.56mm NATO
Gun Model MK4
Overall Length 34in
Twist 1:7in
Type Centerfire


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