What the gent above said. If you get an actual brake and it's efficient, the forces trying to pull the item off the barrel are substantial. If there's any misalignment between brake and barrel before it departs, you may get a bullet strike in the brake, resulting in damage to the brake. Possibly more.
I've seen what happens when clamp on/set screw retained front sight bases moved forward while firing. I wouldn't want to be on the firing line with you and a clamp on brake. .
Get the barrel threaded. Doing it right the first time is much cheaper than fixing the probable results and then doing it right. Just for informational purposes, without a brake, the recoil of a .223 carbine/rifle is about half that of a .38/9 mm handgun.