If your barrel is the newer 7" barrel then a brake is not an option without modifications. The older style barrels which came with a muzzle brake were 7 3/8". The muzzle brake fits over the 3/8" nub at the end of the barrel and is secured by a screw underneath.
Despite how cool the brake looks, testing has shown that accuracy is slightly affected by the brake so keep that in mind. They also get clogged with lead and powder residue which makes the problem worse. A brake might reduce muzzle flip and allow you to get back on target quicker but its probably not enough to offset the downsides previously mentioned.