Holosun EPS Core Red 3 MOA Enclosed Red Dot

Home›Holosun›Holosun EPS-CORE-RD-3 Holosun · Enclosed Emitter · RMSc · 3 MOA Red Dot Holosun EPS Core Red 3 MOA: enclosed carry optic with a full-size EPS lens Full-size EPS lens. Enclosed emitter. RMSc footprint for slim carry pistols. Holosun’s new 2026 enclosed carry optic: the full-size EPS viewing lens on a compact RMSc-footprint body, with a sealed emitter that keeps dust, lint and rain off the reticle. A single clean 3 MOA red dot (650 nm) keeps the sight picture simple, while a forward-facing light sensor handles brightness, Shake Awake saves the battery and the side-loading CR1620 swaps without removing the optic. 1.4 oz, IPX8. Also searched as the Holosun EPS-CORE, EPS Core Red 3 MOA, EPS-CORE-RD3 or EPS CORE RD 3. EnclosedSealed emitter RMScFootprint 50,000 hBattery life 1.4 ozWeight EPS-CORE-RD-3 · red 3 MOA dot Authorized dealerMPN EPS-CORE-RD-3 · New for 2026 Free shippingCode SWATOPTICS WarrantyHolosun limited lifetime warranty ReturnsFinal sale · Refund Policy 01What you get Six things the EPS Core Red 3 MOA does Enclosed emitter The emitter sits inside a sealed housing, so dust, lint, rain and debris cannot block the dot the way they can on an open-emitter optic. Full-size EPS lens Holosun puts the full-size EPS viewing lens, a 0.90 × 0.63 inch window, on a compact RMSc-footprint body built for slim carry pistols. Clean 3 MOA red dot A clean 3 MOA red dot (650 nm) that Holosun designed for a simple, uncluttered sight picture and fast pickup in a wide range of light. Automatic brightness A forward-facing light sensor adjusts dot brightness to the light you are aiming into, so it stays usable as conditions change. Shake Awake + Memory Motion powers the dot on instantly and down when idle; manual brightness has 8 daylight and 4 night-vision settings with memory and lockout. Side-loading CR1620 The battery tray slides out of the side, so the optic stays on the slide. Rated up to 50,000 hours at setting 6. 02Size & fit Dimensions and footprint 1.61″Length 1.18″Width 0.97″Height RMSc footprint The EPS Core mounts directly on the RMSc footprint used by many slim and subcompact optics-ready slides, with no adapter plate. Slide cuts and screw requirements vary, so confirm your pistol’s cut first. What Red Dot Fits? → Enclosed vs open emitter An open-emitter sight like the 507C X3 leaves the LED exposed at the base of the window, where lint, dust or rain can block it. The EPS Core seals the emitter behind glass, front and rear, which is why enclosed optics suit carry and bad weather. Window is 0.90″ × 0.63″; the optic weighs 1.4 oz. 03Walkaround Every angle of the EPS-CORE-RD-3 EPS-CORE-RD-3 · photo 2 of 9 EPS-CORE-RD-3 · photo 3 of 9 EPS-CORE-RD-3 · photo 4 of 9 EPS-CORE-RD-3 · photo 5 of 9 EPS-CORE-RD-3 · photo 6 of 9 EPS-CORE-RD-3 · photo 7 of 9 EPS-CORE-RD-3 · photo 8 of 9 EPS-CORE-RD-3 · photo 9 of 9 04Specifications Holosun EPS-CORE-RD-3 spec sheet Optical Reticle 3 MOA dot Reticle color Red Wavelength 650 nm Emitter Enclosed Magnification 1× Eye relief Unlimited Window 0.90″ × 0.63″ Coatings Multi-coated Electronic Power source CR1620 battery Solar power No Battery location Side tray Battery life (setting 6) 50,000 h Brightness 8 daylight & 4 NV · 12 total Light sensor Forward-facing Memory Yes Lockout Mode Yes Shake Awake Yes Physical & mechanical Body dimensions 1.61″ × 1.18″ × 0.97″ Body weight 1.4 oz Housing 6061-T6 aluminum, hard anodized, black Footprint RMSc, direct mount Click value 1.5 MOA W&E travel ±30 MOA Environmental Submersion IPX8 Vibration 5,000 G Working temp −30 to 60 °C Storage temp −40 to 70 °C What’s in the box EPS-CORE-RD-3 optic Multi-tool Lens cloth Manual & warranty card Specifications from Holosun Technologies’ EPS-CORE-RD-3 product page. Holosun may update specifications without notice. 05FAQ Holosun EPS Core Red 3 MOA questions, answered What is the Holosun EPS Core Red 3 MOA (EPS-CORE-RD-3)? The EPS-CORE-RD-3 is the red 3 MOA dot version of Holosun’s EPS Core, a 2026 enclosed-emitter pistol sight. It puts the full-size EPS lens on a compact RMSc-footprint body for slim carry pistols, with a single 3 MOA red dot, a forward-facing light sensor for automatic brightness, Shake Awake and a side-loading CR1620. EPS Core 3 MOA or EPS Core MRS? They share the same enclosed housing, full-size EPS lens and RMSc footprint. The 3 MOA model has one clean 3 MOA dot and runs on its CR1620 alone. The MRS model adds Holosun’s Multi-Reticle System (dot, 32 MOA circle, or both) and a Solar Failsafe panel. Pick the 3 MOA if you want the simplest sight picture. What is the difference between the EPS Core and the EPS? Both are Holosun enclosed pistol sights with the same full-size EPS viewing lens. The EPS Core mounts directly on the RMSc footprint used by many slim and subcompact slides; the original EPS uses Holosun’s K footprint. Why choose an enclosed-emitter optic? On an open-emitter sight, dust, lint, rain or mud can land on the emitter and block the dot. An enclosed sight seals the emitter inside the housing, which is why enclosed optics are popular for concealed carry and duty use. What footprint does the EPS Core use? The RMSc footprint, a direct mount on many slim and subcompact optics-ready slides with no adapter plate. Slide cuts and screw requirements vary, so confirm your pistol’s cut before ordering. How long does the battery last? Holosun rates the EPS-CORE-RD-3 at up to 50,000 hours at brightness setting 6 on one CR1620. Shake Awake powers the dot down when the pistol is idle, which stretches real-world life. Does the EPS Core 3 MOA adjust brightness automatically? Yes. A forward-facing light sensor adjusts brightness to match changing light, and you also get 12 manual settings (8 daylight and 4 night-vision) with memory recall and a lockout. Red, green or gold — which EPS Core 3 MOA should I get? Red (EPS-CORE-RD-3) is the traditional color. Green (EPS-CORE-GR-3) is Holosun’s pick for faster visual pickup in bright daylight and against complex backgrounds. Gold (EPS-CORE-GD-3) is the high-contrast option for bright, high-glare conditions. All three share the same enclosed housing, window, 3 MOA dot size and RMSc footprint. Do I have to remove the optic to change the battery? No. The CR1620 loads from a side tray, so the optic stays on the slide during a battery change. Is the EPS Core waterproof? Yes. Holosun rates it IPX8 for submersion and tests it to 5,000 G of vibration, with a working range of −30 °C to 60 °C. 06Related More Holosun optics Holosun EPS Core Green 3 MOASame optic, green dot Holosun EPS Core Gold 3 MOASame optic, gold dot Holosun EPS Core Red MRSAdds 32 MOA circle + solar What Red Dot Fits?Fitment guide