I have these and they work great in my HS-2000 (4" Service). Mec-Gar is known for their quality, heck SA uses them to make the mags for their EMP. I also have the 20 rounders for my Beretta. Not sure about the ProMag.
I have two of the mec gar 18 round mags for my xd 9 tactical. They work great. I have never had an issue with the mags for thousands of rounds. They show just a little bit of wear on the outside because I use them more than the factory mags.
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