The SIG Sauer 8900315 is a factory P320 full-size replacement barrel chambered in 9mm Luger, featuring a 5.5-inch barrel with 13.5x1mm left-hand threading. Machined from steel and finished in black nitride, this barrel is designed without a loaded chamber indicator cut. The 13.5x1mm threading accommodates suppressors and muzzle devices built to this specification.
Engineered for P320 full-size pistols, this barrel serves as either a direct replacement or an upgrade path for adding suppressor compatibility to your firearm. Whether you need a replacement component, want to enhance your P320 with threaded capability, or are building a custom setup, this barrel maintains the reliability and performance standards of the platform. Installation by a qualified gunsmith is recommended.
