If you really have concerns consult a lawyer and if you are really really concerned don’t make a video game. 
In general one can not copyright common words or numbers as a trademark, even though Apple would have you believe other wise, and unless your game makes a ton of bucks it’s doubtful a big name brand will go after you as they are not out to shut you down as a competitor but are looking for the easy money.
As an opinion I don’t see anyone going after you for a weapon called a G37C no more than someone would go after you for calling a sidearm a 1911.
Looking at the big picture though if your game goes top shelf, more then likely, your game will become the target scammers looking to make a few backs, to make them go away, by trying to trick you into believing you own them something.
Overall though if you avoided name brands you would be compliance neutral and anything beyond that would be some nut job looking to make a few bucks or EA using the “opportunity” for a million dollars worth of free advertising.