Released in 2020 and manufactured as a commercial version of SIG Sauer's M18 carry-size service pistol, adopted by the United States Air Force, Navy, and Marine Corps by 2019 to replace the Beretta M9, M9A1, and Colt M45A1. Based off of the company's P320 line of striker fired pistols, the design was selected due to its modularity, with a detachable and serialized fire control unit that allows grip modules to be swapped for different sizes. Includes original box, still factory tape sealed, with end label marked "SIGP320M18", dated "03-AUG-2022", and with the detail "M18,9MM, 3.9IN, M18, COYOTE, STRIKER, SIGLITE W/DP PRO PLATE, MOD POLY GRIP, (1) 17RD (2) 21RD MAG".