The problem of the wide availability of ak types and their ammo.is real. This problem.is about effectively eliminating the vast majority of rifles in the hands of civilians. Now a citizen can't have an ak showing publicly and pretend he is a member of the security forces.
Now why choose this particular rifle? I don't know.
Iraqi soldiers on Social Media on news of these rifles were complaining about not having modern Long range machine guns and the government buying these instead.
The ultimate aim of this small arms change is.important howevee. It's the elimination of millions of weapons sloshing about the country.
Another Question is what happens to the m26 rifles that they operate now? They only bought them a few years ago.... I suppose they can re export some of the newer weapons to the USA hillbilly arms market (but disable full auto)... Or drop them off to the Houthis and shias in eastern Saudi....