Unless you happened to have shelled out the extra cash for a compressor that can do 3000 - 4500 psi which most household compressors won't do anywhere near, then you won't have much luck with doing it yourself. Compressed air, commonly refered to as HPA (high pressure air) or nitro/nitrogen (which is N2, pure nitrogen, not nitrous oxide as in car racing booster) is THE gas to use, superior to co2 in virtually every material aspect. The bottles are either steel or fiber wrapped aluminum with regulated output: stored internal pressure, 3000 to 4500 (even 5000 in some of the latest models) is stepped down to 850 to 180 psi for output to the marker depending on what operating pressure is required for its operation. Any field will fit it for you, for a fee of course, and if you feel the need to fill it yourself, some dive tanks and a simple adapter can do the job quite nicely.
Do yourself a favor and get yourself a HPA tank as soon as possible.
