The Umarex Steel Storm is an auto, well 6 shot burst at full auto, CO2 powered pistol. You can select either single shot or 6 round bursts. With proper trigger control, you can get full auto. This is a very cool air pistol. The CO2 cartridges are stored inside the pistol grip. It’s great for blasting bottles, cans, oranges, clay targets, etc. It has a reservoir for 300 BB’s. The muzzle velocity is 430 fps and retails for $129.
Watch this demonstration of the Umarex Steel Storm Auto .177 BB gun.