People who are making an FPS with mecanim, how do you handle aiming down sights?

How do you animate your aiming down sights in your 3d modelling program so that it still looks right when imported into unity? I'm trying to make an fps with mecanim and it really bothers me that I can't find a way to make an aim down sights animation. I need to be able to see how it looks when viewed by the main camera, but the only way to do that is by using unity's animation tools which sadly aren't supported by mecanim

 

I make a FPS, and if you want ADS don't animate it, just put in your script when you ADS it lerps the gun to the position you want. Makes sure animations you make don't have to have a copy for ADS + you can tweak the position at anytime.

 

I guess that really is the best way to go about it. Thanks for the response.