Gander Mountain’s move to focus some stores on firearms debuts today at its store in Merrillville, Ind., the sixth to make the tansition. The corporate change-over from hunting, fishing and camping to Gander Mountain Firearms Super Centers began last year in Wisconsin, said Scott Tucker, store manager. Firearms enthusiasts will find some 4,000 firearms including handguns, rifles and shotguns, and tactical guns. NWI Times.