Cool but not worth the $ - Matador Arms The Regulator Muzzle Brake

This is just a 2 piece muzzpe break with a spring in the middle. 60 settings is a major exaggeration but to a small extent you can choose from open or closed ports. Maybe 10 settings from open to closed. The differance from open to closed at the muzzle with this device shooting standard target rounds was minimal. Your better off with a standard muzzle break for the money.