MOH Airborne Ironsights question

Most shooters have the ironsights configured to toggle on/off with the right click. MOH Airborne though has it configured that you have to keep the right click pressed in order to stay in ironsights. This is a real immersion killer. Is there a way I can get it to toggle on and off with the right click??

Thanks!

 

Looking around I can't find a way to do it without a mod, I haven't played it in a while and don't remember clearly whether you can or not, if you can it will be in the setting menu, usually under the Key assignment menu.

 

Yes, it is already in the settings menu, but that's not what I'm referring to. The right click puts you in iron sights mode as long as you keep the right click depressed, it doesn't toggle the view as in most shooters. I'm thinking it might be an ini setting, but I don't know enough about ini's to go playing around in them. I was hoping someone here might.