I've been looking at picking up a P-09 / P-10F sized magazine for the past couple of months, for home defense purposes, but they are out of stock everywhere.
There are, however, these ProMag magazines available.
I have to agree with what everyone else here has posted. Personally I wouldn't buy one for anything other than possible range use. The prevailing opinions seems to be that all the magazines they sell are unreliable trash.
I only own one ProMag magazine and that's a 20-round mag for my Ruger Mini-14. I have three rock-solid factory 20-rounders that I keep clean, rust-protected, and loaded with Gold Dot .223 for home defense purposes. So I wanted to get a cheap range mag to use for range trips. The ProMag, when new, was borderline useless. It would constantly hang up, especially with a fully loaded mag. The rounds feel too tight to come out reliably. I tried leaving it loaded to weaken the spring tension but it didn't help. I replaced their crappy follower with a Ruger factory polymer follower and now the mag will feed correctly, but it doesn't lock back on empty. Their follower has this extra large spike on top to facilitate lock-back, that the factory follower doesn't need when being run in a factory mag. Basically their mags are out of spec and using the factory follower is a band-aid for the feeding issue. I can live with that at the range but I'd never buy another ProMag magazine if I had any other choice.
If Mec-Gar would sell their own P series branded mags like they do for CZ75 they would probably be good quality, just like the P series mags they manufacture for CZ, but it's my understanding they can't or won't do that because of their arrangement with CZ.
