Play alternative montage?

hi i recently learned the montage play command for my fire weapon animation
i was wondering how i would change the animation based on my aiming state i.e not aiming plays hip fire anim and is aiming plays ironsights fire anim
as currently when i aim down sights and fire weapon it plays hip fire anim and not ironsights anim.

plz help.

I have temporeraly solve this whith a branch but would still like to hear other ideas.