Available at the Russian airsoft seller, Airsoft Store, is the KJ Works KP-13F Gas Blowback Pistol. This is a full auto pistol that is CO2 powered and has a metal slide and polymer lower frame. It has an easy to reach fire selector, 14mm CCW Threaded Outer Barrel, and comes with a 23-BB round gas Magazine. Alexander of Red Army Airsoft does an overview on this full-auto CO2 blowback pistol.