While shooting today I was doing semi rapid fire drills. 2 shots on the right target, 2 shots on the lower target and then step over and 3 shots on the left target. When i moved over to the left target to take my three shots i noticed that the chamber indicator was sticking up so high that i could not see my front site. By the time i noticed it was that high, i had already pulled the trigger. Then my gun jammed. The casing didn't fully eject. After clearing the jam I noticed that the chamber indicator was missing. We could not find it. Has this happened to any one else on here?