That's what has me intrigued.
The slide in the PM45's that we've seen here for the most part either don't work, or notch the metal in the slide between the guide rod hole and the barrel hole, or run 100% AFTER that notch is made.
Me thinks that Kahr hasn't fully machined the slide, which is causing it to bottom out against the guide rod, which is causing many failures to feed/eject/lock back.