It is a sweet little gun. I got one via a donation to a local gun cause. It's slim, lightweight, and fun. I had it about a month and was reassembling it after cleaning, and made the mistake of compressing the recoil springs on the assembly. Fingers slipped. Springs and all the retaining clips went one way, rods went another. Tiny pieces never found again. Now waiting on the entire assembly from Kel Tec. I'll update with time frame and cost once (if ever) I get it.
To me, that is a pretty fragile assembly (and pretty stupid to let it slip and compress it more than needed! My bad, but...)
I have watched some critical youtubes about it FTF. Lubbed mine before trying to run any rounds through it and had no issues. I am not sure how many semis you can take new out of the box, load, and fire as fast as you can and not FTF. Neer tried it and never will. Who knows what may be in the barrel! I think the people were looking for an issue since it is a Kel Tec.