The Holosun 507C X3 Green Dot Reflex Sight features advanced multi-reticle technology with 2 MOA dot and 32 MOA circle dot options for versatile target acquisition.Holosun 507C X3 Green Dot Open Reflex SightMulti-reticle system: 2 MOA dot or 32 MOA circle dotRMR/SRO standard footprint for easy mountingCR2032 battery power sourceBlack matte finish constructionCompact dimensions: 1.8" length 2.65 oz weightHolographic sight technologyDesigned for pistol applications this reflex sight provides rapid target acquisition with green dot visibility in various lighting conditions. Mount sold separately for RMR-compatible platforms.