I have a 2003 Glock 22. It has 6500 rounds through it, both .40 and 9MM with conversion barrel. No FTEs until I installed an after market slide cover plate. I've had 3 instances where the the gun fired, leaving the empty case in the chamber. I had to remove the SCP, extractor depressor plunger & extractor to get the fired case out of the chamber. Upon reinstalling the OEM SCP function returned to normal. The malfunction only occurred with weak 9MM loads, not NATO 9MM or 165 Gr .40....
Failure to extract, slide cover plate involvement
Failure to extract, slide cover plate involvement