Love my Jetfire Inox, too.
I've always wondered if that barrel "flip-up" thing could happen. I agree with Jim. Just a quick snap-down until a sharp click is heard.
I don't know if it's right or wrong, however I take a Q-tip and put a little oil on the latch under the barrel. It seems to make the "pop-in" go easier. Anyway, the click is faster and louder plus I've never had a problem.
KR