A LASER gun is a device that emits a beam of light energy, usually in the form of a RAY or ZAP. It is often used for medical, industrial, and military purposes. The term 'LASER gun' is derived from the acronym LASER, which stands for Light Amplification by Stimulated Emission of Radiation. The crossword solutions for the term A LASER GUN are ZAP (3 letters), RAY (3 letters), TONER (5 letters), and ZAPS (4 letters). ZAP and ZAPS refer to the beam of light energy emitted by the LASER gun, while RAY and TONER refer to the type of light energy emitted.