The links below aren't for a brake. Most people use the terms muzzle brake and flash hider interchangeably.
If my assumption is out of line, I apologize.
The reason I mounted a FH on my DPMS LR308 instead of a brake was muzzle rise is nonexistent on my unit, but I'm running a 20" barrel, an adjustable gas block, a flat buffer spring, and a radically modified buffer.
Smith Enterprise Vortex Flash Hider 11/16-24 Thread M22x1.0 Outside
Smith Enterprise Vortex Flash Hider 5/8-24 x .735 Depth Thread AR-10