It seems decent enough of an idea but it would kindof kill the purpose of it being a pistol. I just think the warp may be a bit big for this. I like the thought of a spring feed to the side something kind of like a tippman smg but spring loaded http://www.vintagerex.com/cgi-bin/in...r&man=Tippmann
of course not all projects need to make perfect sence. Sometimes a "because i can" is enough reason to do so.
another odd thought is to make a spring fed loader that will sit on the gun much like a beretta 93R forgrip. http://www.geocities.com/Yosemite/6144/93r.htm
You would have to include a few bends into the feed which would trap a few balls in all the time but something else to look at.