Below are some stills of muzzle flashes found in some different films. This is comparing "apples and oranges" such as M16 to a MG42, so take that into account. The truth of the matter is muzzle flashes are very Hollywood, youtube some gun footage and count how many muzzle flashes you see.... not many. BUT, we're making a movie!
Full Metal Jacket, 1987
Over all not many muzzle flashes and much smaller then modern films.




Heat, 1995
Huge muzzle flashes all over the place.




Saving Private Ryan, 1998
Not as many as in most modern war films.



Band of Brothers, 2001 Episode 4
There are a few more large muzzle flashes in the series, but mostly similar to Saving Private Ryan.




Black Hawk Down, 2001
Get out your sunglasses, do they stop shooting in this film?





We Were Soldiers, 2002
Not too many, i really had to hunt them down.


