A flash hider is a device that is attached to the muzzle of a firearm that is designed to reduce the visible signature of the firearm when it is fired. This is typically accomplished by dissipating the burning gases that are expelled from the barrel so that they do not create a bright flash. A muzzle brake is a device that is attached to the muzzle of a firearm that is designed to reduce recoil. Muzzle brakes work by redirecting the gases that are expelled from the barrel of the firearm in a way that counteracts the rearward force of the recoil. This can help to reduce the felt recoil of the firearm and make it more comfortable to shoot. Both flash hiders and muzzle brakes are commonly used on rifles and other firearms that are used for shooting sports, hunting, and other activities where recoil and muzzle flash can be a concern.