... but it is clear to me that the Kahr, PF9, LCP's are likely built to much lower tolerances than the R9, allowing more rounds to be fired at one sitting without soiling and overheating the pistol enough to change tolerances of moving parts enough to affect function...
Yeah man, for real. I was at the range today, and a guy handed me his Kel Tec 9mm to look at. The tolerances are so loose, that when you shake it in your hand, the parts rattle around sounding like a pocket full of loose change. I showed him my R9, and he couldn't believe how close the fit of the parts was. Then he saw my Seecamp 380 on the table, and said, "Wow, you really have the Rolls Royce of pistols with these two."
In my opinion, the Kel Tec 9mm really looks like a cheap piece of junk up close, and handling it will make clear the differences. It reminded me of the Bryco, Jennings, Davis, Lorcin, Hi-Point, etc... junk guns that used to be all over the streets of the city in the '80s and early '90s. Exploding pieces of crap, more reliably useful as hand grenades.








You get the idea...