Ever the watch Tales of the Gun on the History channel for the AK-47? Talked about a group of guys who left an Ak-47 in a locker for God knows how long in the humidity of Vietnam, kicked the bolt open and it fired like it was brand new.
Amazing gun IMO, definately a spray and pray weapon, but that is what it was designed to do. That's also why the special forces used them instead of the M-16 (at the time), always reliable.
Good buy, have fun!