It is quite hard to DIY the FMG-9
I think Mcpull got thier idea from M-21smg and PP-90 and give it a better out look.
http://world.guns.ru/smg/smg70-e.htm
http://world.guns.ru/smg/smg10-e.htm
Even the hand grip needed to be folded in, if any one really need to mod one for themselves I think Marui's extreme.45 is a better platfrom. Since the Hi-cap system's lower fram is 2 parts.
