yeah it sounds like you essentially want a suppressor mono-core baffle system that you can pin to your barrel, then slide the outer can over it....
....unfortunately, you wont find anything like that.....not that way you are thinking.....as the "brake" would legally be a suppressor component and subject to regulation just like a full suppressor....
the Suurg....that seems like its kind of skating a fine line as far as legality goes....i can easily see the AFT getting a wild hair up their ass and declaring the "muzzle brake" a suppressor component
but ive not seen anything similar on the market.
the closest thing ive seen is the Witt machine SME...
they are great for redirecting muzzle blast, especially on SBRs.....but they are no suppressor, not in the least.