A little mod makes a perfect weapon light - Streamlight PolyTac Lithium Power Polymer Flash Light

This light is an excellent value for the money. As a weapon light, it will "flicker" because the spring in the tail cap is too weak. Go to the hardware store and get stronger spring of larger diameter to enhance the spring - problem solved.
Pros: constant & momentary switch, rugged
Cons: Tail cap spring weak

This review was written in the old system and had content requirements that are different than reviews written today.