I bought a Mossberg 500a and didn’t notice it has a rifled barrel. I’m looking for a smooth bore 12 gauge barrel preferably 18.5 inches, but will consider other sizes (only has a 5 round tube without the possibility to put an magazine extension on it). I also need a fore end tube/nut, bandolier, side saddle, and a pistol grip for it since it will be a truck gun. Just figured I’d look on here before ordering online.