I've gotten my 7.62X39 up to 30,000 and had to replace some worn stuff. the rated life span of an ak (told by Shiek) is supposibly 40,000. but easily enough, the parts are readily available, and if I had to use a dead man's ak as parts - it's just no problem. ok maybe somebody elses broken ak I got for cheap!(sounded tuff though didn't it).
trigger
extractor (eea charged $20 bucks, bastards!!!)