Silent Steel QD Muzzle Brake is a suppressor mounting 2-chamber muzzle device, which provides excellent muzzle control and recoil management. Closed bottom construction combined with upward-biased V-shape venting eliminates both muzzle rise and dust signature. Tuning ports on both sides allow the user to adjust and eliminate horizontal barrel movement to a more decisive hand direction. Muzzle brakes are delivered with a shim kit and stainless steel M4 tuning screws.