Replay Sports talk about fixing the semi-auto problems of airsoft guns in this video. Good video to watch for those who do their own maintenance work... "Chris Trivane at Replay Airsoft Arena trobleshoots common Semi-auto issues. Replay has a full time tech on staff for all your airsoft repair needs. Wed.-Fri. 6pm-10pm, Sat. 3pm-10pm, Sun. 3pm-7pm."