- "Reduces the speed at which the muzzle moves upwards while shooting."
— In-game description
The Flash Hider is a weapon attachment featured in Tom Clancy's Rainbow Six Siege. It hides the muzzle flash of weapons so the enemy may take longer to notice where the shot come from. Every time the weapon starts firing, it slightly reduces the vertical recoil and greatly reduces the horizontal recoil for the first 3 shots. Internally, the Flash Hider reduces first shot vertical recoil by approximately 13% and overall vertical recoil by approximately 15%. 
Unlike the Muzzle Brake which only reduces first shot vertical recoil, the Flash Hider's effects will last throughout the entire spray, much like the Vertical Grip. This means that the Flash Hider is most effective when used on fully-automatic weapons.
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