Crosman Holster

it's a nice idea but I would say no with a little maybe

the leather ones would not have room for the tube, the fabric ones could but some have the barrel come out the end

It would have to be a chest rig, I don't think I could clear a holster with a 16 inch contender

I have seen some neat TC holsters but you would be in the 150.00+ ranger for leather

this is what I found on a quick look but for a scope, where as the red dot might be to wide

https://www.amazon.com/Federal-Shoulder-Holster-Thompson-Pistols/dp/B00GFTYK4C