I am wanting a new gun. I am thinking a home defense 12ga. I was looking at the JIC mossberg 500. I think i have a better idea though. I can buy the mossberg 500 combo for like 270 bucks at walmart. IT comes with a 28 inch smoothbore and a rifled deer barrel. If i bought the combo can i take the barrel on the 500 i have no cut it off at 18 1/2 inchs for a home defense gun or would that border on illegal. Also does anyone know where i can get a combo 500 with a rifled barrel and a 18 inch barrel.