[runequester]

The RPG-2, RPG-7 and so forth were pretty much developments of the Panzerfaust concept of a simple, man portable weapon that could be issued to the infantry squad and probably stuck around as much because it's a simple, efficient weapon, that was well understood.

Soviet armaments were chosen as much for their suitability to equip a mass army and conduct a "people's war" as anything else.

Considering the lifespan and service life of the RPG-7, it's hard to say they were wrong, and there's a lot of newer, more potent models out there.