Barrels

AR-15 5.56 NATO 6” Micro-Length Barrel – 1:7 Twist, Medium Profile, QPQ Finish | Moriarti Armaments

Enhance your compact AR-15 build with the Moriarti Arms 5.56 NATO 6" Micro Gas QPQ Barrel—engineered for shooters demanding extreme maneuverability, superior corrosion resistance, and optimal performance in short-barrel platforms.

Precision-machined from 4150 Chrome Moly Vanadium steel, this barrel features a QPQ (Quench Polish Quench) nitrocarburized surface, offering enhanced strength, reduced friction, and far greater corrosion resistance than traditional chrome lining. QPQ converts the surface at the molecular level without dimensional buildup, resulting in a smoother, harder, and more durable finish.

The micro gas system is optimized for ultra-short AR-15 pistol configurations, delivering reliable cycling when paired with proper tuning. A 1:7 twist stabilizes a wide range of 5.56 projectiles, and the barrel is threaded 1/2x28 for use with standard muzzle devices and suppressor mounts. Outfitted with a QPQ-coated M4 feed ramp extension and an 11-degree target crown, this barrel is built for consistency, durability, and accuracy.

Perfect for PDW builds, ultra-compact AR pistols, and high-performance personal-defense platforms.

Key Features

• Ultra-compact 6" configuration

• QPQ nitride finish for maximum corrosion resistance and surface hardness

• Micro gas system designed for short-barrel reliability

• 1:7 twist for versatile 5.56 ammo compatibility

• Threaded 1/2x28 for standard muzzle devices

• Machined from 4150 CMV steel for durability

• M4 feed ramps for reliable feeding

• 11-degree target crown for consistent accuracy