The Viridian Custom RFX is a micro green dot dedicated to the Ruger LCP MAX. It is a direct fit with no adapter (1x16) and projects a 3 MOA green dot. The CR1632 battery (smaller than a CR2032) delivers up to 30,000 hours, and auto shut-off with auto-brightness manages power. The machined aluminum housing is black and IPX4 rated. Features: Micro green dot, open reflex, dedicated to the Ruger LCP MAX Direct fit, no adapter (1x16) 3 MOA green dot CR1632 battery, up to 30,000 hours Auto shut-off and auto-brightness Instant-On activation Machined aluminum, black, IPX4 rated Fits the Ruger LCP MAX only. This is a dedicated fit, not a universal optic footprint.