back, at last.
SeaRex - you want to get started into Airsoft? first of all, good for you. Its a good but expensive hobbie. A good way to get started is to purchase a cheap but decent AEG (Automatic Electric Gun) with a big battery. I skipped this stage out, as i had the money to get a better gun, which i suppose was a bad idea, you have to run before you can walk!
so, a good starter AEG would be the Heckler & Koch MP5A4, the solid stocked varient of the infamous SMG. These can be brought
here Though, i'm not sure there is an American version of this site anymore. Failing that, try
here They have good guns for cheap prices. You'll have to buy a battery for the gun, i'm not to sure on the prices of them, but they can be purchased at those two sites. A charger has to be brought too, again i'm not sure on the prices. A good charger to start off with is a simple trickle charger, cheap but slow.
Another good starter gun would be the FAMAS, the G3 or the M16A1. All of these take the same battery and can be purchased at those sites.
Abe's son - It will be VERY hard to make a MA5B from a P90, you would be much better off making it from a Styer AUG Civilain. These can be purchased in airsoft. They also can be reloaded in the same way as the MA5B. It'll take some hard work though. If your serious though, PM me and i'll show you some decent pics to help.
hope i've helped you all there.