The Lead & Steel L&S LS9MM55-36 5.5 AR9 Nitride Barrel 1/2x36 is a compact 9mm AR-9 barrel designed for builders who want reliable performance in a short package. Built from chrome moly vanadium steel with a black nitride finish, it offers durability and corrosion resistance while maintaining a smooth, consistent bore. The threaded muzzle with a 1/2x36 pattern makes it ready for compatible muzzle devices or accessories, and the clearly marked 9mm chamber and 1:10 twist support common 9mm loads.

This 5.5-inch barrel is well suited for AR-9 pistols and short-barreled range builds where maneuverability and compact overall length are priorities. Its configuration lends itself to training, recreational shooting, and general range use with modern pistol-caliber carbines. Lead & Steel’s attention to material selection and finishing reflects a focus on dependable performance and solid craftsmanship.

Key Features:

• Manufacturer: Lead & Steel
• Model: AR9
• Caliber: 9mm
• Barrel Length: 5.5 inches
• Barrel Material: Chrome Moly Vanadium Steel
• Barrel Finish: Black Nitride
• Twist Rate: 1:10
• Thread Pattern: 1/2x36