Awesome muzzle device from an outstanding company. - Griffin Armament M4SD Muzzle Brake

First of all, this thing freaking rocks. Very easy installation, and it locks up nice and solid. Recoil mitigation Is great, but 5.56 doesn’t really have that much to begin with. Firing my rifle with the muzzle device installed was a dream. It works as advertised, and keeps the barrel very stable. The fit and finish were excellent, and optics planet did their part making sure I got it in time to shoot this past weekend. After 400 rounds on the range I can say this is an absolute no-brainer to buy. I definitely will be doing more business with Optics planet Due to their quick shipping and low prices. I cannot wait to get the M4SD2 suppressor for this fantastic brake. A+++++