I have 2 GSG 1911-22 pistols and shoot Federal 38gr copper plated rounds. Both pistols have exhibited a high number of Fail to Feed / Fail to Eject. I've put ~300 rounds through each. My research has led me to purchase the PES and new guide rod from CW Accessories (CW Accessories LLC | Products) to eliminate spring and guide rod issues. These new parts did not make a difference, but will likely save me some trouble down the road with breaking plastic guide rods. I have also found people discussing their polishing of the slide rails, and any other parts that come in contact, due to imprecise machining of parts and a weak finish job. Some claim their problems went away immediately. In my manual tests, I did note that the slide seemed a bit sticky, so I polished the places where parts make contact with 400 grit wet/dry sandpaper. Manually it felt a lot more smoother, but alas did not make the FTF/FTE issues go away. I have not shot the 2 pistols enough to determine if I have decreased the frequency of problems. I have not shot different ammo yet, but I would be shocked if the pistol is this sensitive and would likely sell them. I also have not yet disassembled the slide to check the dirty level of the extractor. I can't find info on cleaning the GSG 1911-22 extractor, and am hesitant to assume it's the same as normal 1911. Any suggestions from those that have owned this pistol?