The Holosun EPS Core is an enclosed-emitter pistol optic built on the RMSc footprint, giving slim carry pistols full-size EPS viewing performance with a clean 3 MOA red dot. The fully enclosed design keeps dust, lint, rain and debris away from the emitter, so the dot stays clean in a carry holster. Reticle: 3 MOA red dot Footprint: RMSc (direct mount on RMSc-cut slides) Emitter: fully enclosed Window: 0.9" x 0.63" Housing: 6061 aluminum, hard anodized Battery: CR1620, side-loading tray, up to 50,000 hours Brightness: 8 daylight + 4 night vision settings, automatic brightness adjustment, Shake Awake Adjustment: 1.5 MOA per click, 30 MOA windage and elevation Durability: IPX8 waterproof, 5000G vibration rated Weight: 1.4 oz In the box: EPS Core optic, lens cloth, multi-tool, manual, warranty card. Confirm your slide is cut for the RMSc footprint (or use a matching adapter plate) before ordering.