The OP said he wanted a flash hider that did not require a threaded barrel, not a muzzle brake.
The Choate is a flash hider that secures with 2 roll pins, and has a winged front sight as part of the unit. It is easy to install, just make sure you have it straight up before drilling the roll pin slots. If you get it slightly canted, you might find at the range that you have to use up all your rear sight windage to get it zeroed.
Here are a few pics of the Choate on my Mini-30: