Laser weaponry are laser-based ranged weapons used by many forces in the universe. Laser weapons fire a single coherent ray of light (achieved by crystals that make the beam visible). There do exist laser weapons that fire invisible beams, but they are usually reserved for snipers.
Laser weapons are relatively easy to produce and maintain. They require no solid ammunition, have few moving parts, and use power cells which can be recharged or quickly swapped with a fully-charged power cell. This makes them ideal for distribution among large numbers of men. While the accuracy of a laser is not being distorted by wind unlike projectile weapons, it can be diffused by heavy particles in the air such as smoke and thus a laser can dissipate over long distances.
Laser weapons come in all shapes and sizes, from pistol-sized weapons to massive crew-served laser cannons used in the anti-tank role.