• *The discussion of the creation, fabrication, or modification of airgun moderators is prohibited. The discussion of any "adapters" used to convert an airgun moderator to a firearm silencer will result in immediate termination of the account.*

FX Bent barrel?

One thing that we use to do to our rifles when I played airsoft. The barrels on many of the "sniper rifles" are built the same way as the FX barrel system is made. I would remove the inner barrel and apply some electrical tape as tight as I could. Then put the inner barrel back into the outer barrel and then make a plug to center the barrel with the outer barrel. Melt some wax and slowly pour it between the two barrels. Once hardened it would secure the inner barrel and there would be no vibrations or movement.

Have considered doing something similar with the FX barrels. Though I would wax the inner barrel to aid in removal of the liner, and use a slow curing epoxy instead of the wax. This should make a much more solid connection as well as helping with centering the liner. Could easily be done in stages as well to make sure there are no air bubbles and that the liner is centered. Could be a cheap and easy way to make a custom liner if you are unable to find a carbon sleeve.
Why not just use the carbon fiber liner stiffener?
 
So if there's say about .01 room around carbon fiber and the liner?
Given a 3% shrink factor thats like .0003
Seems pretty good to me!
.01" or mm? I doubt seriously there is .004" clearance. As the barrel errrr....liner isn't a true cylinder and having no accurate way to measure the sleeve, it's based on a few decades of getting round things to mate, very closely. I used some JB on two of mine and one was almost a oh damn moment, took a bit of not so gentle persuasion to get it to go on.