Zero Tech Optics Thrive HD 1x 21mm x 15mm Micro Reflex Sight - 3 MOA Green Dot

The Zero Tech Optics Thrive HD Micro Reflex is a compact, lightweight reflex-style optic built around a 21mm x 15mm viewing window and a true 1x magnification for fast, both-eyes-open target acquisition on pistols and other RMSc-pattern firearms.

At the heart of the sight is a 3 MOA Green Dot reticle paired with adjustable brightness settings that let the dot be tuned for daylight or indoor use. Multi-Layer AR-coated lenses maximize light transmission through the wide viewing window for a clean sight picture.

The Thrive HD uses the popular Shield RMSc footprint, making it a direct mount for slide cuts and optics-ready pistols cut for that pattern. A user-replaceable CR2032 battery powers the unit for up to 50,000 hours of runtime, with auto-on and auto-shutoff features that preserve battery life between range sessions.

Built to ride hard, the Black housing is sealed fog-proof, shock-proof, and waterproof, and the whole optic weighs just 0.67 oz (about 19 grams), light enough to disappear on a carry slide while still standing up to recoil and rough handling. A molded rubber protective cover ships with the sight.