I've seen some sources that describe the Mossberg 400G as being produced under license by a Canadian ( Ontario ) company by the name of Lake Field Arms Ltd. ...dates of manufacture not listed. In 1994, Lake Field Arms Ltd. was sold to Challenger Industries, a holding company that also owned Savage Arms and Passive Bullet Trap, located in Westfield, Mass, U.S.
Shooters the go to guy here for a majority of everything. Not mention ripsnotr up there. Let us know how the search goes. When I get home, I'll check around for ya too.