OK. Thankyou sf. Re; Kel-tec PF-9 / I also read that there are reported issues with the magazine spring and catch which may cause the magazine to become unseated.
I don’t own one so can’t really tell you a lot.
Check out the Kel-Tec forum and I’m sure you’ll learn more than you’d ever want to know.
http://www.ktrange.com/forum/pf-9/