quick question KAR120c:
are you referring to part # 9 in this photo? (the "cage")
if so, i have to tell you that i have purchased new 6 or 7 TM and KJW G26's and NEVER have i had one come with part#9, instead it is a small pin that goes in the nozzle. (it is apparently supposed to be the "cage" and a screw holding it, although i have yet to see one in real life. sounds odd, but it's true.
anyway, your magazines have inconsistent wear on them, which i find odd. i will look closer at the pictures shortly.