Abstract: An aim assistance light beam is provided for a firearm having a barrel and a movable fore-end assembly for loading shells and actuating a firearm action. A lamp and reflector throws that light beam upon electric energization of a lamp in the lamp and reflector assembly. A battery housing for mounting that lamp and reflector assembly is below the barrel and is in the form of a hand grip for manual actuation of the fore-end assembly. That battery housing is mounted on the fore-end assembly for manual actuation of the fore-end assembly with that battery housing which also contains the battery for electrically energizing the lamp.

Abstract: An aim assistance light beam for a firearm having functional parts necessary for the operation of that firearm as a firearm is provided by adaption of a battery housing to a contour of that firearm below a barrel and ahead of a trigger guard thereof as seen in a direction of the light beam, for reception of an electric battery remotely from a stock of the firearm. A common fastener is provided for that battery housing as well as for one of the necesary functional parts of the firearm, and both that battery housing and that one necessary functional part are attached with that common fastener to the firearm. A light source is mounted on that battery housing for providing an aim assistance light beam upon energization from the battery through an electric on-off switch provided independently of any trigger and hammer assembly of the firearm.