It seems the answers I'm getting with regular Google type searches have been getting dumber. I'm cleaning up an old 16 ga. pump shotgun. It has a unique double 'humpback' through which a locking lug fits into when in closed. (The cut is clean through the receiver) There is no model number or designation anywhere on the gun. The barrel is stamped 'Browning' (Belgium) Mod. choke. Just looking for general info and maybe some assembly pic's as I have a spring out of whack somewhere on the shell lifter. Any info or link to something would be appreciated.