Weapons and Firearms; Citing this act as the “Responsible Gun Ownership Act”; requiring background checks on all persons involved in a firearm sale or other transfer; requiring firearm sales or other transfers between unlicensed persons to be conducted through, and processed by, a licensed dealer; specifying requirements for firearm sales or transfers through licensed dealers; providing criminal penalties; prohibiting licensed dealers from selling firearms without trigger locks or gun cases; providing exceptions; providing definitions; prohibiting certain actions leading to the manufacture or assembly, sale, or transfer of a firearm not imprinted with a valid serial number, etc.