The Combat Arms Training and Maintenance (CATM) course trains basic cadets on the nomenclature, assembly/disassembly, and safe operation of the Sig Sauer M18 pistol as its new service sidearm. the M18 is replacing the Beretta M9. Basic cadets fire the Air Force Qualification Course (AFQC). If basic cadets earn an expert rating for the M-18 AFQC, they will be authorized the wear of the USAF small arms expert ribbon.