I had one I won at a DU banquet, came with both barrels. Put a 4X weaver scope on and my fully rifled barrel and spent $50 on 5 boxes of different slugs to see what shot best. Never could put 2 within 6″ of each other. What I found out was the barrel has the screw that goes into the magazine which is different than browning or remington. It is virtually impossible to get that hand screw tight enough by hand to keep the barrel from moving after every shot. Try tightening it with a pliers or vice grips. It’ll help but I never could get mine to quit “wandering”.