American gun owner Scott-Dani Pappalardo who described himself as a 'firm believer of the 2nd Amendment', even having it tattooed on his arm, decided to give up his his AR-15 rifle by sawing off the barrel.An AR-15 Rifle was the same gun used by Nikolas Cruz in the recent Florida high school mass shooting.Pappalardo posted the video with the hashtag #Oneless, and he is hoping his actions will convince other gun owners to do the same.