A flash hider is a device that helps to suppress the visible light emitted by the muzzle flash of a firearm. It does this by allowing part of the hot, expanding gases from the burning propellant to escape into the atmosphere before they have time to fully expand and cool, thereby reducing their brightness.
According to most military manuals, a properly functioning flash hider will reduce the muzzle flash signature of a rifle by as much as 95%. Reducing muzzle flash not only makes it harder for an enemy to spot and target a shooter at night, but also helps to preserve the shooter’s night vision.
Natalee Answered question June 29, 2022