Yep, fully functional training mags!
Glock added orange dye to the plastic when they made these mags, so they are an obnoxious shade of safety-orange, day-glow, in fact! I think it's a fun color, and I have an easy time tracking them at the range or IDPA. They're available in both FML and NFML, and you can even replace the base plates with the regular black colored ones so only the black parts show when they're in the gun.
As is the case with the black mags, they are backed by Glock's famous service policy! I love orange mags and I load up on them every year at the GSSF match. They're probably the last great deal left on standard capacity mags...