The P365 RX adds a factory-installed Romeo Zero red dot sight and suppressor-height SIGLITE sights to the micro-compact P365 platform. It was the first factory micro-compact pistol sold with an MRDS optic installed, predating the widespread adoption of optic-ready micro-compacts and establishing SIG's optic-first micro-carry strategy. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: 9mm Luger Capacity: 10 Year introduced: 2018, USA Weight: 18.4 oz Overall length: 5.8" Status: Active Intended use: concealed_carry