Where does she keep a spare clip?
But other users were quick to point out there could have been practical reasons for the solider to take the weapon to the beach.
Under Israeli military regulations, if members take their weapon out from their military base they must keep them near at all times.
Punishments for losing or misplacing a weapon can include time in a military prison.
One user on Facebook wrote: 'An explanation for this photo (I served in the IDF): the girl probably went to beach right after being at the base and serves in a unit that requires her to carry a weapon (not necessarily a combat role), she didn't want to go through the paperwork and permission required to leave the gun at armory.
'Outside of the base we're required to either lock our weapons or have them on us. You can clearly see what she chose.'
Another user wrote: 'The photo is taken on the beach in Tel Aviv, and it is commonplace to see such sights during the summer.'
Israel's compulsory military service means that almost the entire female population must spend two years in the military after reaching 18.
Women make up almost one-third of the force, and 50 per cent of its officers, making the Isreale Defence Forces one of the most gender-equal units in the world.