Muzzle flash on a gun Is there a way to make muzzle flash come out of a gun using the smoke simulator with fire and smoke?  I've seen a lot of tutorials that use an object coming out of the gun that lights up, but it doesn't seem to look as realistic as real fire.

Thanks
Usually you wouldn't want to create a muzzle flash using a smoke simualtion. The flash is only visible for one frame.

I'd recommend you to parent a plane to your gun and create a Material for the flash with animated transparency.
Plug an image texture of the flash into an emission shader, so the flash illuminates the scene accordingly.