Due to the short barrel length on the "Ultra"s, I'm not sure it would cycle 100% for you.
We just picked up a barrel from Storm Lake for one of our Kimbers (mid sized gun, not an Ultra) - very well made, but it's going to need some gunsmith fitting.
This is why I have always recommended Jarvis barrels when available. Buy once, cry once. The Storm Lake barrels and others just don't compare.
In this case I don't believe Mr. Jarvis makes barrels for the Ultra Carry guns. I concur that suppressing the Ultras will likely be problematic due to the extremely short barrel. I think you risk damage to the slide/frame. I'd buy a more suitable suppressor host.