The Viridian RFX15 is an open-emitter micro reflex green dot for pistols on the Shield RMSc footprint, with a larger viewing window than the RFX11. It ships with a Picatinny adapter and is finished in FDE. Features: 3 MOA green dot 17x24mm viewing window Open-emitter reflex design Shield RMSc footprint Includes Picatinny adapter Instant-On activation 8 visible plus 2 night-vision brightness settings CR2032 battery, 30,000+ hours runtime, 2-minute auto-off Aluminum housing, IPX6 water resistance Weighs ~0.65 oz, FDE finish Confirm your slide is cut for the Shield RMSc footprint, or use the included Picatinny adapter.