For auto loaders like the Beretta 1301 Tactical/Benelli M4/Mossberg 930 etc, etc. What is considered "permanent" in regards to modifying the magazine tube as not to go over the 5 round legal capacity? I want to pull the trigger on a Beretta 1301 and get a mag tube extension to flush it up with the muzzle and then plug it to 5 rounds. I've held off getting into semi-auto shotguns for this reason alone, but now I can't ignore the itch anymore.