http://www.ar15.com/lite/topic.html?b=6&f=43&t=264513

Pics on page two.

Same material, new proprietary mold, yet costs $25 compared to $35+ for the MSAR AUG mags.

They are coming out with an E4 version of the stg556 that uses ar15 mags. Looks like they finally caved in.