Moriarti AR-15 300 Blackout 5" Cookie Cutter Upper

5" Cookie Cutter 300 BLK Upper: Specs

Elevate your shooting experience with the Moriarti Armaments 300 Blackout 5" Cookie Cutter Upper Assembly. Crafted for precision and reliability, this upper is engineered to offer unmatched recoil reduction and superior performance, making it the perfect choice for short-barreled rifles and pistols. Whether you're hitting the range or building a tactical AR-15, this 300 Blackout upper assembly ensures you get the most out of every shot.

Features & Specifications:

• Action: Semi-Auto
• Gas System: Micro Length Gas System for optimal cycling and reliability in short-barreled builds.
• Chamber: 300 AAC Blackout – Designed for both supersonic and subsonic loads, perfect for versatile shooting styles.
• Twist Rate: 1:7 – Ideal for stabilizing both subsonic and supersonic projectiles.
• Muzzle Device: Strikes Industries Cookie Cutter Compensator – Reduces recoil and muzzle rise, perfect for short-barreled rifles (SBRs) and AR-15 pistols. Features 5/8x24 thread for a secure fit.
• Barrel: 5" 300 Blackout Government Profile – 4150V Nitride Finish, heat-treated for durability and performance. Includes M4 feed ramps and .750 gas block diameter for smooth function.
• Handguard: 4" Moriarti MLOK Free Float, Slim Profile – Lightweight and low profile, with black anodized aluminum for a solid and corrosion-resistant finish.
• Upper Receiver: A3 Flat Top – Made from certified 7075-T6 aluminum, precision-machined, and hardcoat anodized to government specs. Includes forward assist and dust cover for added functionality.

Key Benefits:

• Unparalleled Recoil Reduction: The Strikes Industries Cookie Cutter compensator significantly reduces recoil, ensuring fast follow-up shots and greater control during rapid firing.
• Precision Performance: Built for accuracy, this 300 Blackout upper offers consistent and reliable performance for both tactical shooters and hunting enthusiasts.
• Compact & Lightweight: The 5" barrel and MLOK handguard design provide a lightweight and maneuverable platform, perfect for close-quarters and home defense setups.
• Mil-Spec Durability: Constructed from 7075-T6 aluminum and 4150V nitride-treated steel, this upper assembly ensures long-lasting durability and resistance to wear and corrosion.

Additional Notes:

• Does Not Include BCG & Charging Handle: These items are sold separately. Choose from a wide selection of Bolt Carrier Groups and charging handles to complete your build.
• Anodized Black Finish: The upper receiver and handguard feature a durable, non-reflective black anodized finish, designed to withstand harsh conditions and provide a sleek appearance.

Perfect For:

• Short-Barreled Rifles (SBRs)
• AR-15 Pistols
• Tactical Builds
• Home Defense Rifles
• Hunting & Precision Builds
• Versatile Shooting with Subsonic & Supersonic Ammo

Upgrade your AR-15 with the Moriarti Armaments 300 Blackout 5" Cookie Cutter Upper Assembly for an unparalleled shooting experience. Engineered to handle the power of 300 AAC Blackout while delivering reduced recoil, this upper assembly provides a compact and reliable platform for any shooter.

Images may not be an exact representation of the product.

FAQ

Can 300 Blackout ammo be mixed up with 5.56?

Keep them separate. A 300 BLK round can chamber in a 5.56 rifle and firing it can destroy the gun, so mark your 300 BLK magazines and uppers clearly.

Is a bolt carrier group included?

No. Add a standard AR-15/5.56 bolt carrier group; it is available as an add-on on this page.

What twist rate does the barrel use?

A 1:7 twist, which stabilizes both heavy subsonic and lighter supersonic 300 Blackout loads.

Related: 300 Blackout AR-15 uppers · Micro ARP 300 Blackout pistols · 5.56 NATO vs 300 Blackout