I got a WASR 10/63 this summer and have just been plinking with it lately at around 20-30 yds. I have noticed that the rear sight goes from P(I think that is the letter that designates battle sight range)>100>200 on up to 1000. I know that an AK is pretty much useless(at least trying to use sights on an AK) beyond 400 yards/meters, so why does the rear sight go on up to 1000? Unless they are using feet or some other smaller unit than a yard/meter I don't see the point in anything bigger than 300 or 400 yards/meters. I guess my ultimate question is "what is the unit used on my rear sight if it is numbered up to 1000?" EDIT: here is what it looks like, pic is from the web, not my gun.