PUMA 16" Barrel is it legal?

well i put a barrel extension on it to make it legal, i drilled, pinned and welded the pin in place as the law states to make it a permanent extension. even if u dont have nothing to hide and the officer seems to be throwin his badge around and then wants to know if he can search, tell him to get a warrent and waste his time and the time of a judge and make the officer explain to his boss why it took a warrent to prove u were clean to begin with. iv done it several times and then found out later the officer got a repremand in his file for acting the way did. but like was said be polite no matter what attitude the officer has and make sure your legal in all aspects other than the reason you were stoped to begin with. politeness goes a long way