The SIG Sauer P320 Compact RXP is a premium striker-fired 9mm pistol built on the proven P320 platform and factory-equipped with a SIG ROMEO1 PRO red dot optic. In the 320XC9BXR3RXP configuration, this is the XCompact RXP variant, designed to balance concealability, shootability, and fast target acquisition for defensive carry or range use. It features a 3.6-inch barrel, XSeries compact grip module with integrated magwell, flat XSeries trigger, and suppressor-height X-Ray3 day/night sights that co-witness with the optic.

This model comes from the factory with two 15-round steel magazines, and the optic-equipped RXP package is one of the more desirable P320 Compact variants because it includes the red dot from the factory rather than as an aftermarket add-on. The XCompact grip and slide package are widely marketed as offering a strong balance of comfort, concealment, and capability.