AR-15 5” 5.56 NATO Micro Barrel – 1:5 Twist | Moriarti

Distributors

Engineered for maximum compactness and velocity in a micro-platform, the Moriarti 5” 5.56 NATO barrel delivers superior performance in ultra-short AR-15 pistol builds. With a 1:5 twist rate, this barrel is ideal for stabilizing heavier 5.56 rounds in tight quarters. The medium profile, combined with 4150 Chrome Moly Vanadium steel and a QPQ corrosion-resistant finish, ensures long service life under harsh conditions.

Whether you're building a PDW-style AR pistol, suppressed SBR, or just want unmatched maneuverability, this micro-length barrel is ready to perform.

Barrel Specs:

• Caliber: 5.56 NATO

• Length: 5"

• Twist Rate: 1:5

• Profile: Medium

• Material: 4150 CMV (Chrome Moly Vanadium)

• Finish: QPQ Corrosion Resistant (Black Nitride)

• Gas System: Micro

• Gas Block Journal: 0.750"

• Muzzle Thread: 1/2x28 TPI (suppressor-ready)

• Barrel Extension: M4 Feed Ramps

• Crown: 11° Target Crown

• Weight: 12 oz

• Dimpled: No

Images may not be an exact representation of the product.