31. The 7 " bbl was introduced in 1978 with no provision for a muzzle brake . 32. The muzzle brake was often omitted due to the scarcity of resources later in the war. 33. It is mounted with a muzzle brake to cut down on recoil, jump and flash. 34. The revolver has a 16.5-inch barrel with no muzzle brake or ports. 35. Muzzle brakes tend to be found on larger firearms, such as magnum rifles and artillery.36. On certain S & W Performance Center models the compensator is replaced with a muzzle brake . 37. Additionally, the weapon's weight and large muzzle brake also assist in recoil reduction. 38. The subsequent Mk IV was fitted with a L / 50 barrel, with muzzle brake . 39. It is equipped with a multifunction muzzle brake that can be used to launch rifle grenades. 40. The revolver has a 2.625-inch barrel with no muzzle brake or ports.
