Stargate SG-1 Weapons Again! :)
Not quite sure if this fits in here, but I just saw an episode from Stargate SG-1 (Season 7, I think), where the team seemed to have acquired a major upgrade in firepower. I saw a SOCOM modified SAW, and Maj Carter is walking around with a very short barrelled M16 carbine with fixed stock, Aimpoint and C-Mag. Much better than the MP5's they had been using in the first few seasons.
Those are real firearms from the amount of muzzle flash and the empty cases.