As they do ship with mech packs maybe put them on the hero and champion chassis or even the special variant.
The only other time you get to see them as far as i am aware is here in forums as you can see (THE HAMMER) pic to the left.
Just think they should be seen more and not just changed every time a new mech comes out.
Edited by Turkeyshoot, 18 January 2017 - 09:04 PM.