You have a couple issues going with a shorty barrel.
If you are going to suppress it you will want a break that works as a suppressor qd mount.
If you arent most brakes are going to beat you senseless from the shockwave redirected towards you especially if your under cover.
If you dont care about hearing loss even from wearing hearing protection as you will still get damage from sound wave to bone conduction of the shockwave pretty much any brake will do.
With a barrel that short flash suppression is what i would look at until you suppress it. Then the suppressor will act better than any muzzle brake out there.
My muzzle brake of choice is the surefire. Im very interested in bravo company's design as they intend it to be used on shorter barrels.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent