Yea I know magpul, but usually just their magazine products. That AFG looks pretty good actually. Might give it a try.
Btw, I wonder if the ARES gas block is compatible with the TM and JG ones? They're ALL supposed to be interchangable(at least they look so) but when I recently swapped a JG block with a TM one, it took me a lot of dremelling some of the metal bits just to get it to fit.
Since gas blocks are one of the weak links on a G36, I'm looking at getting some spares(I own 2 G36s) and the only ones I see out there atm are the ARES ones.