SpudFiles

what is more effiecent in terms of power and wasteing of air, a cloud or a vortex?

I'm pretty sure a vortex would be more efficient as far as air usage and consistency. A cloud, however, would be easier to build.

k thanks for the quick reply, i have built a cloud before but my friend wants to build a tank thing for airsoft and he wanted a fully auto gun for it

I don't thing there would be any perceptible difference, aside from perhaps feeding reliability.

If you want to improve performance and efficiency, all the relevant parameters are covered in some detail here.