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CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Tungsten

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Tungsten

CMMG · Upper Receiver

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Best price

$1,299.00at OpticsPlanet

Out of stock Sale checked Oct 22, 2026

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Where to buy

StorePriceAvailabilityBuyAdd to build
OpticsPlanet $1,299.00Salechecked Oct 22, 2026 Out of stock Buy at OpticsPlanet

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Price history

Dashed line = out of stock. Tracking since Oct 13, 2026.

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Since Oct 13, 2026.

About this part

The CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Tungsten is a 16.1" 5.56 / .223 upper receiver from CMMG. One store lists it, OpticsPlanet at $1,299.00.

Fits and works with

Caliber
5.56 / .223 · Shop matching ammo
Bolt
Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Muzzle thread
1/2x28 · Muzzle devices
Barrel length
16.1" · Handguards

Specifications

Manufacturer
CMMG
Color
Tungsten
Platform
AR-15
Caliber
5.56 mm NATO

From the manufacturer

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Tungsten. 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. 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 Gas System Length: Mid Length Barrel Twist Rate: 1-7 Firearms Threads Per Inch: 1/2x28 Muzzle Device: CMMG Zeroed Muzzle Brake Finish: Cerakote Fabric/Material: Aluminum Gas Block Journal Size-Diameter: .750 in Gun Rail: M-LOK Gun Make: CMMG Weight: 5.05 lb Gas System Type: Direct Impingement Magazine Included: No Package Contents: CMMG Dissent Mk4 5.56mm 16.1in Upper Group CMMG 55BC737-TNG: Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Tungsten

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$1,299.00 at OpticsPlanet
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