Well, the 31 rounder I bought when I purchased the rifle is a KCI and it will feed only thirtee rounds before jamming, with a bullet pointed nose down. I’m gonna take it apart and file out the roughness I can see when I have the bottom off. The plastic and metal has a piece of what looks like the black plastic obstructing the mag tube at one of the holes. I have never had a true Glock mag that would not feed properly after loading it up to one less than specs and leaving it for a couple of days. This KCI hi cap wouldn’t allow more than thirteen rounds into it before tipping nose down.
Thanks to all who stopped by.
Have a great week yall.
I’ve had to file down my factory Glock mags to make them feed at the same area you said on the KCI. I bought from Cabelas two of the 22 round .40 S&W factory mags and they jam like a FM.