5" AR-15 Suppressor Ready Pistol Upper Assembly – Choose Caliber & Color

AR-15 ARP Upper

5" AR-15 Suppressor Ready Pistol Upper Assembly – Choose Caliber & Color

The Moriarti 5" AR-15 Suppressor Ready Pistol Upper Assembly is available in 5.56 NATO, .300 AAC Blackout, and 7.62×39 configurations.

Each assembly features a 5" 4150 CrMoV steel barrel with a black nitride finish, micro-length gas system, 4" slim free-floating M-LOK handguard, and A3 flat-top aluminum forging upper receiver.

The assembly is supplied without a muzzle device or suppressor. Bolt carrier group and charging handle selections are available separately.

3. Key Features

• 5" 4150 CrMoV barrel with black nitride finish

• Caliber choices: 5.56 NATO, .300 AAC Blackout, 7.62×39

• Micro-length gas system

• .750" low-profile nitride-coated steel gas block

• 4" slim free-floating M-LOK handguard

• 7075-T6 aluminum A3 flat-top upper receiver

• Caliber-specific muzzle threads

• Customer-selectable exterior finish

• Optional bolt carrier group and charging handle

• No muzzle device or suppressor included

4. Specifications

Common specifications

5. Package Includes

One assembled 5" AR-15 pistol upper in the selected caliber and exterior finish, with installed barrel, gas system, and M-LOK handguard.

BCG and charging handle are included only when selected as paid options. Muzzle device, suppressor, and lower receiver are not included.

6. FAQ

What twist rate is used for each caliber?

The 5.56 NATO and .300 AAC Blackout configurations have a 1:7 twist rate. The 7.62×39 configuration has a 1:10 twist rate.

Does this assembly include a muzzle device or suppressor?

No. Neither is included. Suppressor and mounting-system compatibility must be verified independently.

7. Product Image Notice

Images may not be the exact representation of the product.