556 with M4 mags compatibility
 

I searched the forum and nothing jumped out as useful.

With the cyma and KA versions of the 556 I am wondering what works and doesn't work for compatibility with Mags. Looking for first hand "I did this and it worked/didn't work."

From the link below is looks like MAG brand are the right fit for the KA but any confirmations?
Did some googling and the better of the links I could find
http://boardreader.com/thread/Does_a...pgXy07max.html

http://shop.ehobbyasia.com/magazines...lack-8pcs.html

MAG brand 100BB m4 mags seem to fit quite snuggly and feed 100%.