Working on getting my MP22k from GCI running. Basic firing function (stripping rounds, chambering, and firing) is working fine but I'm having some issues with cycling. The biggest problem at the moment is ejection. From what I can tell, extraction is reliable but the casing isn't being properly kicked out through the ejection port. This results in a jam every shot or two. The manual says to start by removing material from the inside of the extractor arm so that it grips the casing more tightly, which I have done but I'm still having the same problem. My current plan is to continue incrementally removing material but I wanted to check if anyone had some experience or insight. Any tips appreciated.