The Faxon Duty Series Threaded Barrel For P320 Full Size 9mm transforms a standard SIG P320 into a suppressor-ready, hard-use sidearm. Machined in-house from stress-relieved 4150 CMV steel and finished in a full salt bath nitride treatment inside and out, this 5.5" threaded barrel is built for long service life, smooth function, and consistent accuracy. Conventional button rifling with a 1:10 twist supports a wide range of 9mm loads, including cast bullets, while the 11-degree target crown promotes clean, repeatable bullet release.

This drop-in barrel is designed to fit factory SIG P320 Full Size slides with no gunsmithing, offering tighter-than-OEM lockup for improved precision. The 1/2x28 threaded muzzle makes it easy to add a suppressor, compensator, or thread protector, making the barrel well suited for range work, training, competition, or defensive setups where reliability and accessory compatibility matter. Faxon is known for careful machining, rigorous quality control, and a focus on practical performance in every barrel they produce.

• Manufacturer: Faxon Firearms
• Model: Duty Series Threaded Barrel For P320 Full Size 9mm
• Caliber: 9mm Luger (9x19 Parabellum)
• Barrel Length: 5.50"
• Barrel Material: 4150 CMV Steel
• Barrel Finish: Salt Bath Nitride
• Firearm Fit: Sig P320 Full Size