AR-9 9MM 4.5" Pistol Length Complete Upper – MLOK, Flash Can, Non-LRBHO (Slick Side) | Moriarti Armaments

Uppers

Moriarti AR-9 9MM 4.5" Pistol Length 'Patriotic' Complete Upper - MLOK, Flash Can, Non-LRBHO

The AR-9 9MM 4.5" Pistol Length Complete Upper is the perfect choice for building a compact and high-performance AR-9 pistol. This slick side upper receiver is non-LRBHO (No Last Round Bolt Hold Open) and includes a heavy-profile 4.5" barrel, MLOK handguard, and a flash can muzzle device. Designed for reliable blowback operation, this upper is ideal for building a lightweight 9MM AR-9 pistol or carbine. Patriotic Series -Features dust cover and charging handle with American Flag engraving.

Key Features:

• 4.5" Heavy-Profile 9MM Barrel: The chrome moly vanadium barrel features a nitride finish for superior corrosion resistance and durability. The 1:10 twist rate ensures consistent accuracy, and the barrel is threaded with 1/2x36 for compatibility with standard muzzle devices. The heavy profile provides excellent stability and reduces barrel whip.

• Slick Side Upper Receiver: Built from billet 7075-T6 aluminum, this AR-15 flat-top upper receiver has a slick side design (no dust cover or forward assist), which reduces weight and simplifies the build. The 9mm enhanced design ensures optimal fit and function for blowback operation.

• MLOK Free-Floating Handguard: A 4" Super Slim MLOK handguard is included, offering lightweight and durable construction. This free-floating handguard provides ample space for accessories and ensures improved accuracy by preventing contact with the barrel.

• Muzzle Device - Flash Can: The upper features an aluminum flash can designed to minimize muzzle flash and direct it forward. It is threaded with 1/2x36 to match the barrel's threading, providing a clean and effective muzzle device solution.

• Blowback System: Optimized for blowback operation, this upper is designed to deliver smooth, reliable cycling. It is perfect for use in 9MM AR-9 builds, providing excellent functionality and recoil management.

• 9MM Bolt Carrier Group (BCG): The 8620 steel BCG included in this kit is precision-machined to handle the 9mm blowback system and ensure durability through thousands of rounds.

• Mil-Spec Charging Handle: The charging handle is Mil-Spec AR15 style and includes an American Flag design, offering both functionality and style.

Why Choose the AR-9 9MM 4.5" Pistol Length Complete Upper?

This AR-9 4.5" pistol upper offers a high-performance build for your AR-9 pistol or carbine project. Whether you’re looking for compact size, reliable cycling, or lightweight construction, this upper will meet all your needs. The slick side upper receiver design removes unnecessary features like the dust cover or forward assist, creating a sleek, clean build that's easy to maintain. The heavy-profile barrel ensures excellent stability and accuracy, making it ideal for various applications, including target shooting and home defense.

If you’re building an AR-9 and need a reliable, lightweight upper assembly, this is a great choice.