This SIG Sauer factory replacement barrel (SIG part number 8900443) fits the P320 Full-Size and is chambered in 9mm Luger with a 5.5-inch threaded muzzle, finished in Black Nitron. It is built for slides without the loaded chamber indicator, and every barrel is specially heat-treated for toughness and long-term durability. The 1/2-28 RH thread pattern is ready for a suppressor or other muzzle device without any additional machine work. This barrel is not compatible with the P320 X-Five slide, so confirm your slide model before ordering.

Key Specifications

• Chambered in 9mm Luger.
• Barrel measures 5.5 inches in length.
• Threaded at 1/2-28 RH for a suppressor or muzzle device.
• Built for slides without the loaded chamber indicator.
• Fits the P320 Full-Size.
• Specially heat-treated for toughness and durability.
• Genuine SIG Sauer factory replacement part.
• Finished in Black Nitron.
• Not compatible with the P320 X-Five slide.

Frequently Asked Questions

Does this barrel work with the loaded chamber indicator? No, it is built for slides without the LCI.

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

Will this fit a P320 X-Five? No, this barrel is not compatible with the P320 X-Five slide.

Buy the SIG Sauer P320 Full-Size 9mm Threaded Barrel

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