Moriarti AR-15 300 Blackout 5" Micro Pistol Upper Assembly – Suppressor Ready

The Moriarti AR-15 300 Blackout 5" Micro Pistol Upper Assembly is built for shooters who demand high performance in a compact platform. Engineered for suppressor compatibility, this upper features a durable 5-inch 4150 CMV barrel with a black nitride finish and a 1:7 twist rate to stabilize subsonic and heavier grain projectiles.

Ideal for tactical builds or home defense, this short-barrel upper includes a slim 4-inch MLOK free-float handguard for maximum modularity, and an A2 flash hider to minimize muzzle flash. The A3 flat top upper receiver is made from billet aluminum, anodized to MIL-SPEC standards, and comes equipped with a forward assist and dust cover.

Note: This upper does not include a bolt carrier group (BCG) or charging handle—giving you the flexibility to complete your build as you prefer.

Key Features

• Caliber: 300 AAC Blackout

• Barrel Length: 5"

• Barrel Material: 4150 Chrome Moly Vanadium, Nitride Coated

• Twist Rate: 1:7

• Gas System: Micro Length

• Gas Block Diameter: 0.750

• Muzzle Thread: 5/8x24 TPI

• Muzzle Device: A2 Flash Hider

• Upper Receiver: A3 Flat Top, Billet Aluminum, Hardcoat Anodized

• Handguard: 4" Slim MLOK Free-Float Rail

• Bolt Carrier Group: Not Included

• Charging Handle: Not Included

• Made in the USA