So I just picked up a ARES M4 and it seems to not like my mid-caps.
(
http://shop.ehobbyasia.com/ares-m4a1...ark-earth.html)
Neither brand I own (I think they are a mixture of 3+ year old MAG, and Kings arms mid-caps) seem to want to run through the gun but the hi-cap it came with runs flawlessly.
I was wondering if anyone had any insight on what are the ideal choice of mid-cap mags would be? I've heard some good things about Magpul M version, but they are pricey.