Per my comment, you can't determine from the picture whether or not there is a round in the chamber. The rifle may not be ready to fire multiple times, but it could be ready to fire once.
A chambered round, but the mag isn’t? deliberately? That’s a pretty strained theory - not just when the mag is a mere 90 degrees from full insertion, and especially when involving a military which is borderline paranoid about chambered rounds. IDF handgun doctrine is built around “mag inserted, empty chamber”: first step on drawing is chambering a round.
Find some solid basis for your “chambered round but no mag” theory before propagating it.