My bro in law has a c9 that I am thinking of buying from him for a great price. The only problem is the clip won't stay in the gun. It's like the clip eject button spring has come out or off. My question is since he is the original owner does it have to be him to send it back to be fixed under their lifetime warnt. or is that something I can do once I get it? Also does anyone have any idea if this is an easy fix I could do myself? Thanks for any help.