So correct me if I'm wrong but I think I'm understanding this correct. I want to make a little snake blaster out of a H&R top break 20ga. Now I want to shorten the barrel and make a pistol grip. Now from what I have read I can't take the barrel down under 18" and the overall length of the Shotty can't be less than 26" correct? Figured I would ask before accidently making an A.O.W.