Viridian RFX 44 / 45 RMR Adapter Plate - Expand the versatility of your RFX44 or RFX45 Closed Emitter Green Dot Reflex Sight with the RFX44 & RFX45 RMR Adapter Plate. Precision machined from durable 6061 aluminum, this adapter plate allows compatible RFX44 and RFX45 optics to be mounted to RMR footprint mounting systems, providing additional firearm compatibility and mounting flexibility. Designed for a secure fit and reliable performance, this adapter plate helps shooters take advantage of one of the industry's most widely adopted optic mounting standards. Features Designed to mount ACRO-footprint optics to a variety of firearms; Precision machined from 6061t aluminum; Hardcoat anodization; Includes hardware to mount plate to gun;