A brevity call announcing the launch of a guided missile from an aircraft against a ground target, typically laser-guided or optical (e.g., AGM-65 Maverick, Hellfire in helicopters).
Application in DCS World
In DCS, “Rifle” is key for deconfliction when multiple aircraft are supporting CAS, SEAD, or anti-armor missions. Other aircraft and JTACs know a missile is inbound and can adjust their timing or geometry accordingly.