This SIG Sauer factory threaded barrel (SIG part number 8900445) is built for the P320 X-Compact and Subcompact, chambered in 9mm and finished in Black Nitron. It is designed for slides that do not use the loaded chamber indicator, so confirm your slide type before ordering. The 1/2-28 RH threading lets shooters mount a suppressor or other muzzle device, and a thread protector cap is included to cover the threads when nothing is attached. At just over a third of a pound, it is a straightforward drop-in upgrade for a compact-carry P320 build.

Key Specifications

• Chambered in 9mm Luger.
• Barrel measures 4.3 inches in length.
• Threaded at 1/2-28 RH for a suppressor or muzzle device.
• Fits P320 X-Compact and Subcompact models.
• Designed for slides without the loaded chamber indicator.
• Finished in Black Nitron.
• Includes a thread protector cap.
• Weighs approximately 0.37 pounds.

Frequently Asked Questions

Does this fit a loaded-chamber-indicator slide? No, this barrel is designed for slides without the LCI.

What thread pattern does it use? 1/2-28 RH, ready for a suppressor or muzzle device.

Which P320 models fit this barrel? X-Compact and Subcompact.

Buy the SIG Sauer P320 X-Compact/Subcompact 9mm Threaded Barrel

Add suppressor readiness to your compact-carry P320 with a genuine SIG factory barrel. Order this SIG Sauer barrel from our handgun barrels lineup, shipped fast from our Lubbock, Texas gun shop.