The Laser Sight is an attachment that was originally to be featured in the game Grand Theft Auto V. It is a laser attached to the gun that points where the bullet will hit.
3D Universe
The Laser Sight is only seen when looking through the scope of the Laser Sniper Rifle. It can only be seen when pointing the scope at a wall and since the player is looking through the scope where the Laser Sight is supposed to be it is useless in game.
HD Universe
In earlier releases of Grand Theft Auto V, Laser Sights were attachments that allowed a beam of red light that would have followed the crosshair, most likely increasing accuracy and/or range. The Lasers would have also been on hostile NOOSE, and Cops in Police Mavericks with Carbine Rifles, although this was cut.
A Police Maverick in a chase. Note the Laser Sight.
Laser Sight coming from the Police in the Police Maverick.
Trivia
- Laser Sights attachments did an appearance in Max Payne 3, where players can equip this attachment to their weapons and sets its aiming and ensures that isn't obstructed. However, the laser sometimes doesn't set the aiming correctly and loss its aiming when the weapon is fired.