Grab a Gas Blowback Airsoft Pistol
When I was in Las Vegas helping out with the Showstoppers event (part of CES). I (for the first time) got to play with one of the gas blowback airsoft pistols. It was way cool. Yeah, i’m sure it seems that working here, all we do is play with toys.. eheh.. I wish. Seriously though, it has a realistic feel (weight-wise) and the blowback action of the pistol was cool. When playing in a skirmish with others, I personally recommend having as a side arm, a Gas Blowback Airsoft Pistol I’ll update this post when someone else is in the office and I can ask them which model I had. Hey, I’m not an all knowing gun guy, but I sure like to play one out on the field. 
Update: The pistol I had was the Green Gas KWA G19 Pistol.