Right now I'm using Vicky3 holding her V3SWAT Handgun which has a yellow 'surefire' type illumination piece on the underside of the handguns barrel portion of the the slide, directly in front of the the trigger gaurd.  Now I've mastered making the yellow light red (yeehaw!,big accomplishment). But how can I make that once yellow , now crimson red into a laserstyle beamshot lasersight???   

I'm sure its one of these thousands of settings/ here and/or there.  So can someone help me out? please?