7.5" 5.56 NATO AR-15 Diamond Cut Upper – 7" M-LOK, 4" Shark Muzzle Brake

5.56 NATO &.223 Wylde

7.5" 5.56 NATO AR-15 Diamond Cut Upper – 7" M-LOK, 4" Shark Muzzle Brake

The Moriarti 7.5" 5.56 NATO Diamond Cut Shark Upper Assembly combines a distinctive muzzle design with Moriarti's signature Diamond Cut M-LOK handguard.

Built around a 7.5-inch 4150 chrome moly vanadium barrel with a black nitride finish and 1:7 twist rate, this compact AR-15 upper features a 4-inch Shark-style muzzle brake with a phosphate finish.

The 7-inch Diamond Cut M-LOK handguard provides a recognizable geometric profile, free-floating construction, and a continuous top Picatinny rail. Its angular openings complement the aggressive Shark muzzle brake for a distinctive appearance.

The assembly includes a forged 7075-T6 aluminum A3 flat-top upper receiver with M4 feed ramps, an installed forward assist, and a dust cover. A pistol-length gas system and .750-inch low-profile gas block complete the configuration.

Chambered in 5.56 NATO and compatible with .223 Remington ammunition, this upper is part of Moriarti's specialty AR-15 upper collection.

Key Features

• 7.5" 5.56 NATO Barrel: 4150 chrome moly vanadium steel

• Black Nitride Finish: Corrosion-resistant barrel treatment

• 1:7 Twist Rate: Right-hand rifling

• 4" Shark-Style Muzzle Brake: Distinctive extended muzzle design with phosphate finish

• 7" Moriarti Diamond Cut Handguard: Geometric cutouts with M-LOK mounting

• Free-Float Rail: Continuous top Picatinny rail

• Forged A3 Upper Receiver: 7075-T6 aluminum construction

• M4 Feed Ramps: Barrel extension and receiver configuration

• Pistol-Length Gas System: With .750" low-profile gas block

• Forward Assist and Dust Cover: Installed

Specifications

Package Includes

• One 7.5" 5.56 NATO AR-15 upper assembly

• Forged A3 flat-top upper receiver with forward assist and dust cover

• 7.5" 4150 CMV black nitride barrel

• 7" Moriarti Diamond Cut M-LOK handguard

• Installed pistol-length gas system and low-profile gas block

• Installed 4" Shark-style muzzle brake

Not Included: Bolt carrier group, charging handle, lower receiver, or magazine.

Frequently Asked Questions

What makes this a Diamond Cut Shark upper?

This model combines Moriarti's geometric Diamond Cut M-LOK handguard with a distinctive 4-inch Shark-style muzzle brake.

Is the Shark muzzle brake included?

Yes. The upper assembly includes the 4-inch Shark-style muzzle brake with a phosphate finish.

What ammunition is this upper chambered for?

The barrel is chambered in 5.56 NATO and is compatible with .223 Remington ammunition.

Does this upper include a bolt carrier group and charging handle?

No. Both components are available separately.

Is the handguard a standard M-LOK rail?

The handguard features Moriarti's Diamond Cut design with M-LOK mounting compatibility and a continuous top Picatinny rail.

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