Moriarti AR-15 300 Blackout 5" Pistol Upper – Spitfire Muzzle, Zombie Green

300 Blackout

AR-15 300 BLK 5" Pistol Hybrid Upper Assembly, Spitfire Muzzle, Mlok Handguard, Zombie Green – Moriarti Arms

Elevate your build with the AR-15 300 BLK 5" Pistol Hybrid Upper Assembly in Zombie Green, precision-crafted by Moriarti Arms for shooters who demand both aggressive styling and unmatched performance. This upper assembly is engineered for optimal function with standard AR-15 lower receivers, offering plug-and-play convenience and compatibility without compromise.

Finished in an eye-catching Zombie Green Cerakote, the upper includes a 5" 4150 CMV barrel with a durable nitride treatment and a 1:7 twist rate, stabilizing both supersonic and subsonic 300 Blackout rounds. The short micro gas system ensures smooth cycling even in suppressed setups, while the QD Spitfire muzzle device efficiently controls recoil and flash signature.

A lightweight 4" Mlok free-float handguard offers attachment flexibility for mission-critical accessories like lights, grips, and lasers. The handguard and upper receiver are color-matched in Cerakote for a cohesive look. A mil-spec A3 flat-top upper receiver, complete with forward assist and dust cover, ensures rugged durability and ready integration with optics and backup sights.

Key Features:

• Chamber: 300 Blackout – Ideal for both suppressed and unsuppressed use

• Barrel: 5" 4150 Chrome Moly Vanadium (CMV), black nitride finish, 1:7 twist

• Muzzle Device: QD Spitfire muzzle brake for recoil control and blast reduction

• Barrel Threads: 5/8x24 – Compatible with suppressors and aftermarket devices

• Gas System: Micro Length – Smooth cycling in compact builds

• Gas Block: .750 Low Profile, nitride-treated steel

• Handguard: 4" Mlok Free-Float – Slim profile, anodized, Cerakoted in Zombie Green

• Upper Receiver: A3 Flat-Top 7075-T6 Aluminum – Mil-spec anodized + Zombie Green Cerakote

• Compatibility: Works with standard AR-15 lower receivers

• Made in the USA

Looking to complete your build? Pair with one of our AR-15 80% Skeletonized Lower Receivers to complete your custom build.

Images may not be the exact representation of product as cerakote color variations may occur. Does not come with BCG and Charging Handle.