Archangel = ProMag while the stock might be nice, its pretty rare in my experience that a ProMag magazine can be counted on.
Since the OP has already bought it, lets hope he reports back about the magazines.
I can probably list the ProMags that have worked well for me on one hand, all the others I've tried have ended up being used as reactive targets:
Metal Mini-30 10-round mags no issues at all!
Kahr K9 mags, but had to replace the springs after about a year, still useful at the range.
Plastic AK 5.56 30-round works in Norinco 5.56 AK, but I only have one, could be a fluke.
Para P10 .45ACP, bodies were usable after Para OEM springs and followers installed.
I'm embarrassed to own up to all the others I've tried in the process of reaching this conclusion.