My FNS-9 had problems last time I was on the range. Inserted mag, pulled the slide back, first round hung up and wouldn't go into battery, which lead to an overall jammed situation. Eventually, was able to pull the mag out and clear it. Tried another magazine. First round went into battery, but multiple jams after that (stovepipes etc.). I've never had one problem with this firearm. Probably have about 2000 rounds through it. I took it home and meticulously cleaned it. I have not attempted to shoot it yet, because now I've noticed a change in the trigger...seems sluggish, stays back and won't return forward. It will reset upon pulling the slide back, but the feel of the trigger has definitely changed.
I have not taken the trigger assembly out, but I do not see anything out of place or binding inside. Any help or ideas would be appreciated.