Custom builds are waaaay harder as well as more expensive.
A: individual parts minus their cost of shipping will cost you more than a whole gun + mags +shipping.
B: Different brands are not 100% cross compatible, for example, when i threw a bunch of JG and modify internals into a CA mechbox I had to break out my dremel. And when I threw a new outer barrel on my 416 it took me about a hour or careful dremelling.
Last edited by AngelusNex; May 20th, 2009 at 20:10..