well , ive put about 130rds through my c9 , and last night i was playin around with it , unloaded of course and i locked the slide back and noticed that there was 2 little raised lines. one on each side of the rear inside of the slide , one of them sheared off. i wish i had a digi cam to show you. i put a few more rounds threw it today and havent noticed any problems. has anybody elses hp's worn like this ?