Sig Sauer P320 Subcompact 9mm Luger Barrel, 4.3" Threaded with Loaded Chamber Indicator & Thread Protector - Steel Black

The Sig Sauer P320 Subcompact 9mm Luger barrel is a direct replacement component designed for P320 Xcompact and Subcompact models. This 4.3" threaded barrel gives you the option to run a suppressor or other muzzle devices on a platform known for reliability and modularity. The Nitron finish delivers corrosion resistance in the field, and the barrel comes ready to install with a thread protector cap included.

Swapping barrels on a P320 is straightforward: unload the firearm, remove the slide from the receiver and grip module, and the old barrel slides out. The new one goes in just as easily, making this a practical upgrade path for shooters who want suppressor-ready capability without buying a whole new gun. The loaded chamber indicator keeps you visually informed of your firing status at a glance.

This barrel suits shooters and hunters running a P320 Subcompact or Xcompact who want to add a suppressor later, practice with softer recoil impulse through a can, or simply prefer the flexibility of swappable barrels. Whether you're building out a duty backup, a home-defense rig, or a compact carry gun with suppressor versatility, this is the straightforward way to get there without a gunsmith visit.

Key Features

• 4.3" threaded barrel for suppressor or muzzle device compatibility
• Loaded chamber indicator for at-a-glance status confirmation
• Nitron finish for field durability and corrosion resistance
• Thread protector cap included
• Direct fit for P320 Subcompact and Xcompact platforms
• User-installable; no gunsmith required

Specifications

Frequently Asked Questions

What P320 models does this barrel fit?

This barrel is designed for P320 Subcompact and Xcompact models with a loaded chamber indicator, or any P320 originally chambered for a 3.6" 9mm barrel.

Can I install this barrel myself?

Yes. Unload your firearm, remove the slide from the receiver and grip module, and slide out the old barrel. The new barrel installs the same way. No gunsmith required.

What's included in the box?

The barrel comes with a thread protector cap. You'll need a threaded muzzle device (suppressor, flash hider, comp, etc.) separately if you plan to run one.

Is this barrel compatible with suppressors?

Yes. The 1/2" x 28 TPI threads accept standard 9mm threaded muzzle devices, including most common suppressors.