MORIARTI AR-74 16" 5.45x39 Nitrided Barrel – 41V50 Steel, Carbine Gas, 1/2x28 Threads

Built for shooters who demand AK-caliber performance in an AR platform, the MORIARTI AR-74 16” 5.45x39 barrel is precision-machined in-house from tough-as-nails 41V50 chrome moly vanadium steel. Featuring a black nitride finish, this barrel resists wear, corrosion, and heat — making it a top-tier choice for high-volume range days or rugged field use.

With a medium profile and carbine-length gas system, this barrel delivers a perfect balance of weight, durability, and recoil control. The 1/2x28 thread pitch gives you full compatibility with standard muzzle devices and suppressor mounts.

Unlike basic blanks or unfinished parts, this barrel is heat treated, stress relieved, and comes ready to install — complete with M4 barrel extension, M4 feed ramps, and gas port hole pre-drilled. This is a fully spec’d component, made exclusively by Moriarti Armaments, and purpose-built for your next AR-74 or 5.45x39 AR upper build.

Specifications:

• Manufacturer: Moriarti Armaments

• Model: AR-74 16" Barrel

• Caliber: 5.45x39mm

• Barrel Length: 16 inches

• Material: 41V50 Chrome Moly Vanadium Steel

• Finish: Black Nitride

• Profile: Medium

• Twist Rate: 1:8

• Thread Pitch: 1/2x28

• Gas System: Carbine-Length

• Gas Block Diameter: .750

• Feed Ramps: M4 Style

• Extension: Barrel extension and pin installed

• Gas Port: Pre-drilled

• Treatment: Heat treated and stress relieved

• Made in USA