i have the 2 tone model, it works amazing, never had an issue over the 1000rds ive put through it. had a blued version before this one and never had an issue with that one either. as for the sharp edges and the bluing removal from stoning/emery etc just keep it oiled, and dry and youll never get rust. if you use it in the rain or really humid enviroments just make sure you store it dry. these norcs are great, get the gun/ammo combo, shoot all the ammo, and sell the gun for 300$ (will sell in under 24h) afterwards and buy a new combo lol.