u/0HSHIFT

Adding my feedback as a data point.

I have owned my 43x MOS for a few years. EPS Carry installed, Streamlight, Night Fision sights.

I previously bought 4 PSA mags which don't have a ton of rounds through them. One of them had a malfunction on the first outing, so I just went back to OE and moved on.

I received 4 Glock 15 round mags this week.

Yesterday I did 30 rounds through each magazine with no issues.

Today I did an additional 75 rounds through each mag with no issues.

This was all S&B 115 Grain FMJ.

I also did 5 rounds of Fiocchi 147 grain JHP in two of them just to make sure it would feed and cycle.

That's 430 rounds total across 4 magazines. No issues so far.