I was searching for an alternative source for power after spending about $16 every two days for the past week due to the heavy air consumption of my artisan co2 foot control. It's a high pressure hand pump! Similar to a bike pump but for n2/compressed air paintball tanks. It looks like an aweful lot fo work though:
http://www.youtube.com/watch?v=s33ZF4Nbz7A
http://www.crosman.com/airguns/accessories/pcp/HPP2KU