I am going to build a GUU-5/p knockoff,(basicly the M4 with a A2 upper.) It is our current issue weapon. The guy I built an A2 for (my second build) when it was our issue wants to swap the A2 for a GUU so he has the current issue type to practice with, I think I am going to transform the A2 into something cool, maybe cut it down to 16 for that dissy look, adding rails and such for an A2 upper SPRish build.