The Crimson Trace Defender Series Laser sight has set a new industry standard by offering an affordable self-defense laser with superior technology and design. The Defender Series Accu-Grip lasers replace the factory grips with no modification and feature Top N-Gage thumb activation for quick and reliable activation. All Defender Series lasers feature Beam Lock windage and elevation adjustments, and come factory sighted in at approximately 50'. Crimson Trace also extends one free set of batteries a year for life when you register you Crimson Trace product on the manufacturers website. Notes: Fits Round But J-Frame ModelsDoes not fit Taurus small frame revolvers with polymer frameDoes not fit Taurus 85 models manufactured after 2014