Full-size P320 with factory Romeo1 Pro optic — ROMEO1Pro pre-installed, flush-to-slide integration. The full-size entry in the factory optics-equipped RXP lineup. Type: Pistol Action: Semi-Automatic Caliber: 9mm Luger Capacity: 17 Year introduced: 2019, USA Weight: 24.9 oz Overall length: 7.2" Status: Active Intended use: Service, Personal Defense