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You probably will need to clean it. Then it should work. Take the barrel off, pull out the receiver knob, where you caulk it back at. Straight out. Slid the o-ring and two following pieces off. Note direction they are sitting. Flip gun upside down and push in shell release button for the tube magazine and the receiver will slide out. I would clean it up. You can also knock out the two pins to take out the trigger to clean up. It should clean up you gun. If you need a plug. Get a piece of wooden dowel that will slip into the top of the tubular magazine. Slide two shells into the mag. Mark the dowel and then trim it. It will work good. If you you find you can't put the gun back together, send me a pm. I will walk you through it.