DETAILS Chambered in 9mm, this threaded barrel is meant to fit with P320 XCOMPACT & Sub-Compact models. Barrels can be replaced easily and conveniently by simply ensuring the firearm is unloaded, removing the slide from the receiver and grip module, and sliding out the existing barrel. Includes thread protector cap. SPECS: -Caliber 9MM -1/2 X 28 RH thread pitch Compatibility: This barrel is designed for sub-compact or XCOMPACT P320 variants that do NOT have the loaded chamber indicator.