Since we're on the subject, I was ordering pieces for the exact same project but I was wondering wich one was the best C-mag out there ? I've seen 3 winding options floating around being the one with a pressure switch, another with sound control and a last one that is automatic with the pressure of the BBs in the mag (the last one seeming to be the best option). Oh and excluding manual winding of course...;)

Might be worth it to mention that I'll be using the Classic Army G36 as the base...

IMO, sound activated ones are great.

I bought 2 Hero C mags. Hold 3000 rds and use a pressure switch. They have worked so far with out a flaw.

my cmag failed a little while ago durring a game. the pressure swich cut out on me. otherwise they feed great and work really well. they worked both on my KWA g36 and my CA

what brand of C mag did you have. By buying 2 I have a spare pressure switch as well.....