Frank Proctor comes out with this muzzle device. According to him,
This device also works as good as an A2 flashider in regards to muzzle flash reduction. I have found that this muzzle device is more effective as a brake than any other brake/hider muzzle device I have used, it's also not as loud for the shooter as some of the other muzzle devices on the market.
Price: $74
http://www.wayofthegun.us/proctor-muzzle-device/
From: The Way of the Gun via Soldier Systems