I tried the full auto feature on my Sidewinder 30 for the first time and I guess surprised was the best way to describe the experience. It makes a hell of a racket, cycles faster than I expected and gives a pretty decent push from a standing position. Reminds me a bit of a Sig MP9, a rolling block 9mm I got to shoot a few years ago. The only thing missing was the brass flying everywhere. I know its not practical but it is pretty cool.