The newer Gen 3 tan Magpuls have proven themselves rather well. Not sure if the color matters, but the US Marines approved of them, and a few militaries use them with good success. Some of the units we train in Texas leave them in vehicles and aircraft with no real problems. For whatever reason only the tan Gen 3 Magpuls with windows are “approved” and used by NATO units.
Probably (no telling with the gov) because the MCT M3 pmags have all the "new" features. Older m3 pmags had some pretty severe 2nd round transposition issues, newer m3's, including all the MCT mags have an extra 2 ribs to prevent this issue.
At least temporarily.