Like too much mag spring causing increased drag on the feed lips, leading to sluggish chambering and potentially a failure to feed. I remember having the distinct impression that mag spring tension with any aftermarket mag components on these seems like it could easily create a narrow window of proper operation. Didn't have any issues with the TTI +1 or Vickers extensions. Definitely had nosedive issues with those and would not recommend them for serious use. I tried Magguts followers for the increased capacity. I did have nosedive problems with 1 or 2 mag configurations. The Hogue grip makes all the difference so I put it back on.Been awhile, so my memory is rusty. I will say that I do not have big hands and using it without a Hogue slip-on grip is pretty annoying. I'm happy with it in my short 400 rounds, though. Maybe he can comment about whatever stoppages or issues he encountered in his ownership, if any.

The 8 round mags that SigFiend gave me work great, no issues.

I have two brand new 6 round mags that it will nosedive on when initially chambering a round using the slide-stop, but not when manually racking and not when shooting so I don't care as I don't plan on carrying 6 round mags as a reload for it. This year I took a G42 off Sig_Fiend and it has had no problems or stoppages in 400 rounds of S&B and Hydrashok.

Serial numbers of glock 42 recall