I've shot "a lot" of rounds out of mine. I've had to replace the magazine spring, shell stop springs, extractors on the bolt (Both left and right), the spring on the right ejector, and the frame mounted ejector. I think I even had to replace the right shell stop. Not that the guns bad, but I use it "a lot".
I've known others who had to replace the hook screw because it can snap if you run the gun hard. (I have a spare).
Over all I like the gun, its not the guns fault that parts break or get worn out. Nature of CAS is that we run them hard. I think everyone I know has broken the frame ejector spring more than once. (Don't load the gun sideways, the rim of the shell can catch the spring and break it.). heh