Laser Sight

The laser has in most firearms applications been used as a tool to enhance the targeting of other weapon systems. For example, a laser sight is a small, usually visible-light laser placed on a handgun or a rifle and aligned to emit a beam parallel to the barrel. Since a laser beam has low divergence, the laser light appears as a small spot even at long distances; the user places the spot on the desired target and the barrel of the gun is aligned (but not necessarily allowing for bullet drop, windage and the target moving while the bullet travels).

Battlefield 3
The Laser Sight is a secondary weapon attachment in Battlefield 3. When attached to a weapon, it slightly improves weapon accuracy while hip-firing. Additionally, it can be used to blind targets when aiming at them, however it tends to reveal your position. This can be countered by turning the laser off. When equipped on the weapon the laser sight for the US side appears to be on the right hand side of the weapon very close to the barrel whereas on the RU side the laser sight is attached on the left hand side of the weapon closer to the scope/iron sights of the weapon as can be seen in the picture. The Laser Sight is also default attachment for the G17 (as well as the suppressor). If equiped on a weapon like a P90 or PDW-R the laser sight will change from the regular box like shape to a smaller more rounder, tube like shape. This does not affect the preformance of the gun and is only a visual aspect.