A while back I was reading about the fall of Saigon. I recall that the writer mentioned the fact that many SKSs were stashed around the city for that purpose and when the last siege began, the rifles were recovered for use by the local insurgents/soldiers. Unfortunately, many of the rifles had original wood stocks that the bugs had discovered were pretty tasty, evidentally, because many of the stocks had been eaten away. The article went on to describe how the rifles were still used, however, by wrapping a shirt or some other cloth around what was left of the butt area and fired that way. I've only seen a couple of those "plastic" stocks but know they did exist.