Corrected entry: In the chase, Indy pulls out a rocket launcher at one point. Despite fighting the Russians with their own weapons, it is a Chinese copy of the famous RPG-7, distinguished by the lack of a rear grip. Also, these rocket launchers weren't put into service in the Red Army until 1961.
Correction: Submitted and corrected. it is not an RPG 7, but an RPG 2.
MasterOfAll