Originally Posted by Polak
I shoot 9mm out of my 22 and I've never had an FTE to FTF. It's possible you may or may not have to change the extractor.
I was told that Lone Wolf addressed this issue. Something to do with a thinner chamber wall on the inward side so as to align the 9mm casing with the straight 40 S&W extractor.
The extractor in a standard Glock 26 has a slight bend to it where as the extractor in the Glock 27 is straight.