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A muzzle brake or recoil compensator is a device connected to, or a feature integral (ported barrel) to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter recoil and unwanted muzzle rise. [1] Barrels with an integral muzzle brake are often said to be ported.
Muzzle brake's length: 1-hole brake, 25 mm (1 in); 4-hole, 100 mm (4 in); 5-hole, 130 mm (5 in). The brake adds to the overall length of the barrel when installed. The brakes are changed depending on the recoil force of the rounds being fired. Lighter projectiles require less recoil reduction from the brake to allow the action to cycle.
A muzzle booster or recoil booster is a device fixed to the muzzle of a firearm, intended to harness the energy of the escaping propellant to augment the force of recoil on portions of the firearm. In spite of its name, a muzzle booster does not increase muzzle force or velocity but instead is usually used to improve the reliability and/or rate ...
A flash suppressor is different from a muzzle brake, although they are typically mounted in the same position and sometimes confused with each other. While the former is intended to reduce visible flash, a muzzle brake is designed to reduce recoil inherent to large cartridges and typically does not reduce visible flash. [1]
A muzzle shroud can be used in conjunction with other muzzle devices (such as a muzzle brake, flash suppressor or a brake/suppressor hybrid device). This way the user can still benefit from some of the recoil reduction of a muzzle brake, but with less of the noise and concussion normally associated with such a device.
Muzzle devices can reduce the recoil impulse by altering the pattern of gas expansion. For instance, muzzle brakes primarily works by diverting some of the gas ejecta towards the sides, increasing the lateral blast intensity (hence louder to the sides) but reducing the thrust from the forward-projection (thus less recoil).
The AR-50 rifle utilizes its weight and a large, fluted muzzle brake to reduce recoil. The AR-50 weighs approximately 34 pounds and is a single-shot bolt-action rifle. The barrel is thick and rigid to prevent it from flexing. All AR-50 barrels use 1:15 right hand rifling.
However, the AK-47's heavier weight and slower rate of fire do a good job of mitigating any disadvantage. In addition, newer AK-47-type rifles use a muzzle brake or compensator to reduce recoil. [127] Some AK-type rifles also have vertical foregrips to improve handling characteristics and to counter the effects of recoil. [149] [150]