If you look at the ingame movie footage you can see the muzzle flash from the Garand, MG42 (??) and Thompson. These do sadly look completely unrealistic. I'm hoping for a different look when the game comes around. I did actually ask about the muzzle flash a while ago but didnt recieve any answer, so I dunno. I hope that while playing during the day (seeing theres time of day effects), that when you fire your weapon you only see the powder and smoke coming from the rifle and occasionally a very faint flash/flame and when you shoot at night or in dark areas you can see your muzzle flash very clearly. This would look much better then whats been seen so far, and I realize that the game has come along way since the video so hopefully whats being discussed has been changed.
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Blessed be the Lord my strength, which teacheth my hands to War and my fingers to fight.