I have an H&R Ultra Slug Hunter Deluxe, and it comes with a gun lock that can only be used if the gun is broken open. It is designed so that the gun cannot be fired with the hammer (put a shell in, close the gun, pull the hammer 2/3 of the way back and releasing the hammer may fire the gun, even with a trigger lock on it). Does anyone have any suggestions for another type of lock that might work on this gun, preferably one that I can use and still close the gun? I'm thinking a small lock that blocks the hammer woudl do the same thing, but I don't know if that might have some adverse effect on the hammer, or if a lock like that is even made.