The Viridian RFX Custom 1x16 is a micro reflex green dot built on a dovetail mount dedicated to the Ruger LCP MAX. It replaces the factory rear sight directly - no adapter plate required - and projects a 3 MOA green dot. Features: Micro reflex green dot with a dedicated LCP MAX dovetail mount 3 MOA green dot Replaces the factory rear sight, no adapter needed CR1632 battery, up to ~30,000-hour runtime Instant-On motion activation with auto shut-off Automatic brightness adjustment IPX4 water resistance Built specifically for the Ruger LCP MAX. It does not fit other pistols.