Do yourself a favor and DON'T send it to Wilson Combat...I've had a couple of their brakes and they look cool, but function like crap!! The WIlson brakes that I've had have all pulled my barrel toward the 11 o'clock position, even the one that was factory installed by Wilson combat...The problem with the Wilson muzzle brakes is that the muzzle brake slots that direct the gases are TOO SMALL... Just my personal experience...
I would recommend one of the muzzle brakes done by Kurts Kustom, they look and work a lot better than the Wilson muzzle brakes...Kurt will install any of his brakes, he also has fake brakes and flash hiders...They look cool but don't do anything, they are for guys who don't like the look of a bare barrel...
As far as I know Bushmaster will not install a muzzle brake unless it is a Bushmaster Barrel and you are sending it back to have a Bushmaster brake installed....I agree with others that have side STAY AWAY FROM THE BUSHMASTER MINI Y-COMP....The Bushmaster AK brake is the best brake for the price if you want to control muzzle rise and felt recoil...It is a little loud, but not noticible if you have on hearing protection...
If you want something that looks like an original A2 style flash hider go with the Kurts Kustom A2 brake....You can check out Kurts Kustom Firearms (KKF) in the "Industry" section of this website....