Good point. Jurassic World would have been a shorter movie if Owen Grady had stolen the M134 and blown the Indominus Rex to bits himself when Claire refused to do so.
ME WATCHING A MOVIE KNOWING FULL WELL THAT IF THE MAIN CHARACTER HAD A GUN INSTEAD A DAMN KNIFE THE BAD GUY WOULD HAVE LOST IN 20 SECONDS INSTEAD OF A FULL 2 HOUR FILM; WATCHED