Wodger Wabit over at RFC machined a suppressor adapter for a Volquartsen carbon-fibre wrapped barrel threaded for a .22 muzzle break so that both can be used. Neither the suppressor nor the muzzle break need to be modified. Very cool.
The muzzle break and the threaded barrel
Threaded barrel with adapter
Adapter screwed in, ready for the suppressor.
UPDATE:
The creator of the adapter, Roger, just sent me an email. Check out his website. It contains lots of interesting information on suppressors and air gun hunting.