like what, a Pneu-Mag on an E-mag? also, what experience do you have? not to belittle you, but Pneu-Mag conversions take a bit of knowledge as well as a lot of tinkering to get right. its not for the beginner. if you take a look on
Automags.Org:, in the classifieds as well as other articles on building a Pneu-mag, they can get costly, and do require machine work.
if you have your heart set on a Pneu-mag now, buy one already built. they can be had in the $500-600 range, depending on bodies as well as ancillaries(barrels, frames, rails, etc.).
also, if you have never shot a Pneu-Mag, they are very different than regular Mags. never shot one my self but have always wanted to pick on up. they are a different beast all together. please do a little mor eresearch, as i would hate to see someone pick up something that doesn't suit them or have problems with it because they don't understand it.