Description
The Backup Tactical threaded barrel gives you a straightforward upgrade path if you want to run muzzle devices on your P320 full-size. Built from AISI 416 stainless steel with a black nitride finish, this is a solid replacement barrel that fits directly into your pistol without any modifications.
Drop-In Fit for Full-Size P320
This barrel is designed for standard P320 full-size frames with the factory barrel. It's cut for the loaded chamber indicator, so it works in both LCI and non-LCI slides, giving you flexibility if you're swapping parts around. Installation is straightforward: unload the pistol, remove the slide, and swap out the old barrel. No gunsmithing required.
Built for Suppressor and Comp Use
With 1/2×28 threads, you can attach standard 9mm suppressors, compensators, or other muzzle devices. The barrel comes with a knurled thread protector to keep the threads clean when you're not running an accessory. It was engineered and tested with popular comps and suppressors to ensure reliable function, so you're not guessing whether it'll work with your setup.
Quality Construction and Accuracy
Pulled-broach rifling with a 1:16 inch twist rate handles standard 9x19mm ammunition reliably and groups tight. The AISI 416 stainless steel is held to SAAMI specs and finished in black nitride for durability against corrosion and general wear. Each barrel is produced in small batches to maintain quality control. Backup Tactical backs this barrel with a lifetime warranty against defects.
Key Specifications
- Manufacturer: Backup Tactical
- Model Number: S320TB-BLK-FS
- UPC: 686696690376
- Caliber: 9mm Luger / 9×19
- Material: AISI 416 Stainless Steel
- Finish: Black Nitride
- Thread Pattern: 1/2×28
- Twist Rate: 1:16 inch
- Rifling Type: Pulled-Broach
- Chamber Spec: SAAMI 9mm
- Loaded Chamber Indicator: Cut for LCI; compatible with LCI and non-LCI slides
- Fit: Sig Sauer P320 Full Size
- Warranty: Lifetime warranty
- Made In: USA
What’s Included
- Backup Tactical threaded barrel
- Thread protector (knurled, color-matched)
Frequently Asked Questions
Does this P320 barrel work with non-LCI slides?
Yes. The Backup Tactical barrel is cut for the loaded chamber indicator, but it drops right into both LCI and non-LCI P320 full-size slides without any issues. You get compatibility either way.
What muzzle devices will thread onto this barrel?
The 1/2×28 thread pattern is standard for 9mm. You can attach most common suppressors, compensators, and other 1/2×28 muzzle devices on the market. The barrel was tested with popular comps and suppressors before release to verify reliability.
How do I install this barrel?
It's a drop-in replacement. Unload your pistol, remove the slide from the frame, and slide out the old barrel. Install the Backup Tactical barrel in its place and reassemble. No gunsmithing or special tools needed.
Is a thread protector included?
Yes, the barrel ships with a knurled thread protector. It keeps the threads clean and protected when you're not running a suppressor or compensator on the muzzle.







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