+1.... After taking a second look it looks like you barrel would need to be turned down way to much for it to fit. Looks like after it was turned and threaded it would be really easy to break off! I'll have mine back this week, I had a badger fte brake installed. I can post pics if you would like.
I have a J.P Break on a Douglas Supreme 30-06 A I Barrel 17=1/2" It's a Encore Pistol it has reduced the recoil to a level that is very comfortable on a Handgun. I was amazed how it cut down on the recoil. I don't know how it would be on a rifle but I would guess it would do the same Lou