Thanks Mirek, glow did the trick. It's looking closer to the tutorial image now.

I'll try to animate it next. The way the expression that randomly rotates each muzzle flash is tide to the aim_locator.Firing attribute I am guessing I have to set it to 0 every odd frame and some number between 1 and 10 every even frame. That should rotate the barrels and randomly rotate each barrels muzzle flash every other frame.

Should be interesting...