First off, please note that the term is "Muzzle BRAKE," as in, slow the recoil via a device on the muzzle. The term originated with artillery, when the braking effect was needed to reduce the load on the recuperator, thus allowing a lighter recoil system and gun carriage.
Next, be sure that your state doesn't have the phrase "flash suppressor or threaded muzzle capable of accepting same," as did the 1994 Crime Bill language. M14-type rifles can make the swap from flash suppressor to muzzle brake (or "compensator") because the flash suppressor isn't threaded on, instead the suppressor "slips" on.
So don't get caught by the "threaded muzzle" version of the flash suppressor ban. Too bad the Mini doesn't seem to use the AR-15/M16-standard threads. Come to think of it, the SR-556 has a "Ruger flash suppressor." I wonder what the threads are on that muzzle...
The 10/22 Complete Owner's & Assembly Guide
The NEW AR-15 Complete Owner's Guide & Assy Guide
The M1911 Complete Owner's Guide & Assy Guide
The M14 Complete Assy Guide & M1 Complete Assy Guide
Last edited by wjkuleck; 09-08-2009 at 15:15.