Rating 1/5 When I first received the Blackhawk...and turned it on, it was...study it's operation for a bit....modes and different settings which need...effectively use the light. While...use and the settings reasonably simple...a complex flashlight. After I...up I started to notice that...come on when the button was...by tightening the tail cap, however...requiring another twist of the tail... I did some research and...owners have had this same problem....they acknowledged the problem and sent...the two weeks it took for...there was a reduced incidence of... It would work well for...the light would suddenly shut itself...light came on while it was...bumped by another object. Once...sent me two) I began to...first cap I tried to use...stick in the ON position and...at all. The second cap...same way as my original tail...I replaced the new caps with...of malfunction was less frequent