cyclone feeder Q?

So I know that the cyclone feeder uses co2 or air to operate, but does it use co2/air directly from the air tank or does it use excess or exhausted air that the gun did not use itself to push the hammer?  I guess the question that Im really asking is does the cyclone feeder use more air than the same gun would use without the feeder, therefore resulting in running out of air sooner?

paintball437085 wrote: it uses excess gas

 

so it does not use anymore air than the gun normally would without the feeder?