In The Peacemaker (1997, starring George Clooney), at the 1 hr, 8 min mark, there is a scene where the truck with nukes stops at a checkpoint, and in the end, the bad guys kill the checkpoint soldiers.
The truck driver fires an interesting weapon that looks like a one-shot grenade launcher—like a 40mm tube, 60–70 cm long with a handle. Can anyone identify it?