I’m old enough to remember how much of a nightmare it was to find “standard’ capacity magazines for handguns in the late 1900s when the impact of the AWB was in full affect.   I use to buy semi-auto handguns based on how much the magazines cost and ended up sticking with 1911 handguns and Berettta 92FS firearms.   The Beretta 92FS is still a favorite 9mm of mine, but I have other guns that I prefer for myself.   While I was using my Beretta as a standard CCW gun, I only had 3 standard capacity magazines for it and one of my friends who was moving and getting married was selling his, I only ended up buying his gun magazines off of him.

I have had several Promag magazines from AR15 to 1911s and Beretta 92.   I would say that they are all manufactured from different times and quality varies, but the reliability has been fairly good.  I would not consider them for primary carry, but they are good range magazines.  I have a few friends that use them as primaries, but I would do thorough testing with them and consider having to use a pair of pliers if you have any issues.  I have had very good results from the Promag gun magazines that are made for the Mini 14 and Mini 30.   The 5rd magazines that Ruger ships their guns with are flush fitting and in many States the 20rd and 30rd are illegal, but the 10rd magazines make the Mini 14 a better defensive weapon in these States.  There aren’t very many other options for anything other than 5rd Ruger magazines.