I bought one of these for my TAC14 870 as a home defense gun light. I was concerned about the fit of it with the plus one extension, however please note IT FITS GREAT on the TAC14 with plus 1 extension! Light is very bright, the beam is a narrow LED beam. Switch is off/on and momentary depending on how you push it. Construction is polymer. Uses 2x CR123 batteries. Gives a good positive grip when pumping shotgun. Highly recommend for duty/home defense shotguns.