Umerex Steel Storm. CO2 and BB's, semi and six round burst, something like 1000 rounds per minute. The funnest Christmas present since the Red Ryder. At 20 yards the six quick splashes stitched into the lily pads in the creek was a glorious sight for children of all ages. Plus, it sounds good. Follow the directions when you load it.

It really keeps the feral cats on their toes. Literally. Squirrels in or around the bird feeder don't like it either.

Dan