Take the key code to the locksmith (not a hardware) and they should have a replacement key for you. You can also order replacement locks I found homakkeys.com they seem to carry some gun safe locks....
no it is not I second the statement. NEVER use graphite on a combination lock on a safe. If your dial is hard to turn, you most likely have an internal mechanical problem - be smart and call a safe...
Clips do not lock into firearms, with the exception of revolvers which use half moon clips (such as those designed to fire rimless cartridges) and the M1 Garand rifle. For the answer to this...