I'm confused...
They banned all polymer mags, not just PMAG's:
Despite the success of the PMAG, Army officials from the TACOM Life Cycle Management Command issued a “safety of use message” in April that placed it, and all other polymer magazines, on an unauthorized list.
The message did not single out PMAGs, but instead authorizes only the use of Army-issued aluminum magazines.
Underlining mine. Quality levels in everything except PMAG's is all over the board...the Army's just trying to get a handle back on troops buying their own equipment. I would hope that someone in the upper brass would look to the field and make an exception to this rule for PMAG's, while leaving all the other polymer crap out.