I received an email response from Briley, both the Companion and Sidekick tubes require a 2 3/4" chamber. Briley stated that if the wall thickness was good they could re-chamber the gun to 2 3/4" at $105 per barrel for both the Companion or Sidekick tubes.

I'm glad I asked, but I'm not going to have the chambers lengthened on either of the guns.


I have become addicted to English hammered shotguns to the detriment of my wallet.