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Product Info for CMMG Dissent Mk4 5.56mm 16.1in Upper Group

Supplementing your exisiting DISSENT with another upper or looking to build a new bufferless AR? The 5.56mm DISSENT upper group with a 16.1" barrel is a hard choice to pass up. Pair with a mil-spec compatible lower receiver and the included 1913 Picatinny rear end plate you can add accessories like slings if you're going for a pistol build or a folding stock if a compact carbine is more your style.image

Utilizing our patent pending direct impingement Compact Action, DISSENT upper groups house the entire action and recoil assembly in the upper receiver resulting in less bulk and length than traditional AR pistols. The forward non-reciprocating side charger allows for quick bolt operation without coming off target. Direct impingement DISSENTS come equipped with a left side charger standard. Right side charging handles for DI models are available here.

All DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower receiver buffer tube.

Specifications for CMMG Dissent Mk4 5.56mm 16.1in Upper Group:

Manufacturer: CMMG
Caliber: 5.56x45mm NATO
Overall Length: 25.5 in
Barrel Length: 16.1 in
Barrel Twist Rate: 1-7
Threads per Inch: 1/2x28
Muzzle Device: CMMG Zeroed Muzzle Brake
Fabric/Material: Aluminum
Gas Block Journal Size-Diameter: .750 in
Gun Rail: M-LOK
Weight: 5.05 lb
Magazine Included: No

Package Contents:

  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group

CMMG Dissent Mk4 5.56mm 16.1in Upper Group Orderable Models

List of Orderable Models

  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Anodized Black, 55BC737-HCA , MPN: 55BC737-HCA , Code: 2CM-URC-B1270A2F-55BC737-HCA
  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Armor Black, 55BC737-AB , MPN: 55BC737-AB , Code: 2CM-URC-B1270A2F-55BC737-AB
  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Charcoal Green, 55BC737-CG , MPN: 55BC737-CG , Code: 2CM-URC-B1270A2F-55BC737-CG
  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Tungsten, 55BC737-TNG , MPN: 55BC737-TNG , Code: 2CM-URC-B1270A2F-55BC737-TNG
  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Midnight Bronze, 55BC737-MB , MPN: 55BC737-MB , Code: 2CM-URC-B1270A2F-55BC737-MB
  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Coyote Tan, 55BC737-CT , MPN: 55BC737-CT , Code: 2CM-URC-B1270A2F-55BC737-CT

CMMG Dissent Mk4 5.56mm 16.1in Upper Group Unavailable & Discontinued Models

List of Unorderable Models

  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Titanium, 55BC737-TI , MPN: 55BC737-TI , Code: 2CM-URC-B1270A2F-55BC737-TI
  • CMMG Dissent Mk4 5.56mm 16.1in Upper Group, 1-7 Twist, 1/2 X 28 TPI, .750in, 25.5in, Sniper Grey, 55BC737-SG , MPN: 55BC737-SG , Code: 2CM-URC-B1270A2F-55BC737-SG
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