This is the American MGM-140A (M39) Block 1, a High-Explosive (HE), single-stage, Solid-Propellant (SP), carrier, Inertial-Navigation-System (INS) guided Surface-to-Surface-Missile (SSM) used to dispense 950 x M74 submunitions launched from the M270 Multiple-Launch-Rocket-System (MLRS).
The author marked this model as their own original creation.