Moriarti Micro ARP 7.62x39 5" Upper – Billet A3, Suppressor Ready

5" Micro ARP 7.62x39 Upper: Specs

The MORIARTI ARP-74 7.62x39 5" Micro Pistol Upper Assembly delivers compact power and versatility for any AR pistol build chambered in 7.62x39. Precision-machined and suppressor-ready, this upper features a 5-inch 4150 Chrome Moly Vanadium barrel with a black nitride finish and a 1:10 twist, making it ideal for stabilizing both standard and heavier projectiles.

This upper is built on a billet A3 flat top receiver with forward assist and dust cover, offering enhanced durability and function. The slim 4-inch MLOK handguard provides a lightweight, free-floating rail system for mounting accessories. A standard A2 flash hider is pre-installed to help reduce muzzle flash. 

Compatible with virtually any mil-spec AR-15 lower receivers configured for 7.62x39, this complete upper is ready for your next custom build.

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

Key Features

• Caliber: 7.62x39

• Barrel Length: 5"

• Barrel Material: 4150 Chrome Moly Vanadium, Nitride Finish

• Twist Rate: 1:10

• Muzzle Thread: 5/8x24 TPI

• Muzzle Device: A2 Flash Hider

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

• Gas System: Micro Length

• Gas Block Diameter: 0.750

• Handguard: 4" Slim Free-Float MLOK Rail

• Bolt Carrier Group: Not Included

• Charging Handle: Not Included

• Made in the USA

Can I use a suppressor with a 5-inch 7.62x39 upper?

Yes. A suppressor-ready 7.62x39 upper with the proper muzzle threads can accept compatible suppressor mounting systems. Before installation, always verify your barrel thread pitch, suppressor compatibility, and compliance with all applicable federal, state, and local laws.

Suggested Accessories

• 7.62x39 Magazines

FAQ

What do I need to run a 7.62x39 upper?

A standard mil-spec AR-15 lower, a 7.62x39 bolt carrier group with the larger 7.62x39 bolt face, and AR-15 pattern 7.62x39 magazines. A standard 5.56 bolt and magazines will not work.

Why might I get light primer strikes?

Many 7.62x39 loads use hard military-style primers. A heavier hammer spring or an enhanced firing pin usually solves it; see our guide linked below.

Is a bolt carrier group included?

No. Add a 7.62x39 bolt carrier group; it is available as an add-on on this page.

Related: 7.62x39 AR-15 uppers · fixing light primer strikes on an AR-47 · .30 cal suppressors

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