Description
MPN: 30BC239-AB
FEATURES:
- Compact Action-Direct Impingement System operates without the need for a buffer and buffer tube
- Caliber: .300 Blackout
- Finish: Armor Black Cerakote
- Upper Receiver: CMMG Mk4 Dissent Side Charger Upper Receiver - 7075-T6 Aluminum
- Handguard: 9.6-Inch CMMG Proprietary Handguard
- M4 Feed Ramps: Yes
- Muzzle Device: CMMG .308 ZEROED Linear Compensator
- Barrel: 10.5" 1:7 Salt Bath Nitrided 4140 Chrome Moly Steel
- Muzzle Thread Pattern: 5/8"-24
- Gas Block: .750" Adjustable Gas Block
- Gas Tube: Pistol-Length Gas Tube
- Bolt Carrier Group: Dissent Side Charging Bolt
- Charging Handle: CMMG Dissent Side Charging Handle (Left)
- HP and MPI Tested
*This upper receiver assembly has a barrel that is shorter than 16". This upper is only for use on AR pistol lower receivers and NFA registered Short-Barreled Rifle (SBR) lower receivers. All NFA laws apply!
SPECIFICATIONS:
- Weight: ~3.91 lbs.
- Length: ~19.1"
COMPATIBILITY:
- AR-15 lower receiver
INCLUDES:
- 1x CMMG Dissent 300 Blackout 10.5" MK4 Complete Side Charging Upper
- 1x CMMG Dissent Side Charging Bolt
- 1x 1913 Picatinny Rail End Plate
DETAILS:
If you're looking to build a short PDW-style setup, .300 Blackout makes a whole lot of sense. This caliber is designed to perform well from shorter barrels while still delivering the kind of energy shooters want from a compact rifle or pistol platform. The side charging CMMG Dissent .300 Blackout upper gives you a compact layout, a bufferless operating system, and the handling advantages that come with a left-side charging handle.
A Powerhouse in Compact Form
The CMMG Dissent .300 Blackout upper comes with a 10.5-inch barrel and is chambered in .300 Blackout, giving you a serious foundation for a short build. The barrel is made from 4140 Chrome Moly Steel, which is more durable than standard stainless steel and offers better heat and corrosion resistance. It is threaded and equipped with a CMMG .308 ZEROED Linear Compensator, making this side charging .300 Blackout upper a strong option for shooters building a compact AR-15 setup with better forward blast control.
This upper assembly also uses a low-profile, pistol-length gas tube, which, along with the barrel, is covered by a 9.6-inch proprietary CMMG handguard. The handguard includes M-LOK slots on the bottom and sides, plus a full-length 1913 Picatinny rail on top for adding optics, sights, lights, or other AR-15 accessories that fit your build.
Revolutionary Bufferless Design
Unlike ordinary AR-pattern rifles, this upper uses CMMG’s Compact Action-Direct Impingement System. The recoil spring assembly is built into the receiver, eliminating the need for a traditional buffer tube. That makes this CMMG Dissent .300 Blackout upper especially appealing for compact builds where overall length and rear-end configuration matter.
This CMMG Mk4 upper receiver also features a left-side charging handle for smooth, accessible operation. The receiver is made from 7075-T6 aluminum and comes with the bolt carrier assembly and charging handle included. It also uses the specially designed Dissent Side Charging Bolt and CMMG Dissent Side Charging Handle, which work together to give this side-charging .300 Blackout upper its distinctive feel and function.
Built With Quality Components
The barrel, receiver, and bolt carrier group are made from high-quality materials, and the assembly is HP- and MPI-tested to meet the quality standards CMMG is known for.
Order Complete Upper Receivers From Wing Tactical
Wing Tactical is a veteran-founded source for quality AR-15 complete upper assemblies, rifle parts, and accessories from brands serious shooters already know. Whether you are building a new setup or upgrading your current rifle with better gun accessories, Wing keeps the focus on dependable parts that belong on real builds. Order this .300 Blackout side-charging upper and more today and get your parts moving fast.
