The subject matter discloses an illumination module for a handgun, comprising a body, a mounting interface protruding from the body, and configured to be in physical contact with the handgun slide, a sight, extending from the body, an illumination module configured to emit light towards a front sight of the handgun, a power source electrically coupled to the illumination module, an activation module coupled to the illumination module, maneuver of the activation module activates the illumination module.