They are models. Just ask bdpopeye does women look like that in US navy.
of course there are especially on the officer side.. actually many actually look better than their civilian counterparts because they're in better physical shape unlike the typical american women who is on the heavy side.
As to these photos I'm 99% sure they are models. Not because of the face or body etc but just the way they hold the rifles or how they pose, their mannerism etc.
Also I personally don't think they are that super attractive. They're skinny and appears to be fairly tall but their faces are 'average' except for maybe one or two of them.
As a side note, if you want to see attractive female soldiers the IDF has many of those!