Abstract: A weapon light including a head lamp portion, a tubular body portion and an end cap that is releasably coupled to the tubular body. A spacing is defined within the tubular body portion between a battery spring and an end portion. A first member of the end cap includes at least one slot for sliding receipt of at least one guide member of an insert. The tubular body is configured to threadably receive a spacer member that defines a central aperture such that the battery spring extends from the insert and passes through the central aperture into the tubular body portion to make contact with the power source. The spacer member is selectively positioned within the tubular body portion so that the insert may be urged along slot to position the battery spring inside the tubular body to adjust the spacing to fit the power source size.

Abstract: A rail mounted weapon light for being interfaced with firearm platforms. The weapon light defines an outer housing that includes a main body and an integral outer housing extension that defines an interface profile shaped and sized to slidably engage the track of the firearm platform. The outer housing is configured such that there is an offset between the outer housing extension and the main body. A pressure switch is disposed on the outer housing extension. The pressure switch having a momentary on function and a constant on function. The main body including a head portion that defines an inner chamber for receiving the electronics of the weapon light. The electronics of the weapon light being in electronic communication with the pressure switch.