The only way you hav have it removable is to have it attatched with set screws to an plain (unthreaded) muzzle which 1) will scratch up the barrel, 2) probably fall/shoot off somewhere down the line.
If you want to add some lines to the barrel get the M4 "Patrolman's carbine" with the M203 notch cut into the barrel. Otherwise you'll have to get one of their Compensators permanently attatched.
The Comp Y/Mini Y are the most effective BUT the most disruptive (loud with alot of back blast. The AK brake is a very good brake, but it is also loud.
A another option would be having someone like Kurt's Kustom Firearms attach a "Fake Flash Supressor" or one of his Brakes that looke like a Flash Supressor. The only downfall is not having the upper for a month or so while he works on it.