Moriarti AR-15 AR-400 Legend 7.5" Pistol Barrel – Government Profile

Barrels

AR-400 Legend 7.5" Government Profile Pistol Barrel – 1:16 Twist, 4150 CrMoV, Black Nitride | Moriarti Armaments

Built for short, powerful AR pistols, this 7.5” .400 Legend barrel features a Government profile, 1:16 twist rate, and pistol-length gas system, perfect for straight-wall compliant compact builds. Machined from 4150 CrMoV steel with a black nitride finish, this barrel is engineered for durability, corrosion resistance, and superior accuracy—even in extreme hunting or tactical conditions.

Whether you're building a brush gun or compact hunting pistol, this barrel offers the punch of .400 Legend in a small, maneuverable package.

Barrel Specs:

• Caliber: .400 Legend

• Length: 7.5"

• Profile: Government

• Twist Rate: 1:16

• Gas System: Pistol-length

• Gas Block Diameter: 0.750"

• Material: 4150 Chrome Moly Vanadium (CrMoV)

• Muzzle Threads: 5/8x24 – Suppressor/Comp Ready

• Finish: Black Nitride

• Feed Ramps: M4

Compatible with AR-15 platforms. Pair this barrel with our Moriarti AR-15 Billet Upper Receiver Sets for a complete straight-wall pistol build.