The Lead & Steel LS9MM4.5-28 AR9 9mm Luger Barrel is a compact, threaded 4.50" tube built specifically for AR9 platforms. Cut from durable chrome moly vanadium steel and finished in black nitride, it offers a balance of longevity and smooth performance. The 1:10 twist rate is optimized for common 9mm bullet weights, while the 1/2x28 threaded muzzle makes it ready for muzzle devices or suppressors.

This mid-weight 4.5" barrel is well suited for short, handy AR9 builds used for range practice, training, or general recreational shooting. Its blowback-compatible design integrates cleanly with standard and dedicated AR9 uppers, giving builders a straightforward path to a reliable 9mm carbine or pistol. The precise machining and consistent finish reflect Lead & Steel’s focus on practical, dependable components for modern AR-style firearms.

Key Features:

• Manufacturer: Lead & Steel
• Model: AR9
• Caliber: 9mm Luger
• Condition: New
• Barrel Length: 4.50 inches
• Threaded Barrel: Yes, 1/2x28
• Twist Rate: 1:10
• Material: Chrome Moly Vanadium
• Finish: Black Nitride
• Weight: 0.51 lbs (8 oz)