I've done abit of research/planning, put things on paper and I've came up with a list of gearboxes that may possibly work with a svt40 stock:
-tm Famas V1 gearbox
-tm P90 V6 gearbox
-g&g l85 or army R85 gearbox (not sure what version this is)
only problem is that I only have a general idea of how the L85 and the P90 gearboxes are triggered..

I know they'll all need the trigger repositioned (a reverse ice-cutter trigger assembly of some sort?), but not sure what part of the gearbox is supposed to be linked to the trigger/rod thingy.
any ideas/help?
*note, this is all just me putting things onto paper and figuring out how I'd go about doing this project. I'd probably start this around summer when I have more time to spend on things besides term papers and studying for midterms/finals.*
-beta