The P320 Nitron in .40 S&W is the standard-finish full-size P320 chambered for the .40 Smith & Wesson cartridge. It uses the same modular FCU system as the 9mm variant but with a .40-specific barrel and slide. The Nitron designation refers to SIG's proprietary PVD finish applied to the stainless slide. A popular option for agencies and shooters who prefer the .40 S&W cartridge. Type: Semi-Auto Pistol Action: Striker-Fired Caliber: .40 S&W Capacity: 14 Year introduced: 2014, USA Weight: 29.4 oz Overall length: 8" Status: Active Intended use: duty, law_enforcement