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Osight SE MOS Direct-Mount Enclosed Red Dot Sight with Multi-Reticle System. Features the Industry’s first enclosed emitter optic with direct MOS slide mount. Includes 8 daytime settings and 2 night vision settings. Choose between a 2 MOA dot, a 32 MOA Circle, or a dot-and-circle. Side loading battery compartment ensures effortless battery replacement. The Osight SE MOS combines the protection of an enclosed-emitter optic with an industry-first direct MOS footprint designed for compatible full-size GLOCK® MOS slides. The adapter-free design creates a streamlined, low-profile setup with fewer components, while its low-deck height allows co-witnessing with most factory iron sights. A versatile Multi-Reticle System lets you choose between a precise 2 MOA dot, a highly visible 32 MOA circle, or both together, giving you the flexibility to tailor your sight picture to the situation. With 8 daylight and 2 night-vision brightness settings, you can further adjust the reticle for changing conditions, while an aspherical lens provides exceptional clarity with zero distortion and parallax-free performance for fast, confident target acquisition. Built for dependable performance with less maintenance, the Osight SE MOS delivers up to 140,000 hours of battery life in Mode 3 dot-only and features a side-loading CR1632 battery that can be replaced without removing the optic or disturbing zero. Motion activation powers the optic on with movement, while brightness memory and a low-battery warning help keep it ready when needed. Contents in Package: Osight SE MOS, Adjustment Tool, 3 × M38 mm Screws, 2 × Spare Battery Compartment Screws, Screw Box, Cleaning Cloth. 2 MOA Dot & 32 MOA Circle. 8 DL & 2 NV. 0.83 x 0.55. L-2.44″xW-1.02″xH-1.1. It can also take 2-8 weeks to deliver. We strive to deliver cool products at a great value with the best customer experience. Currently we specialize in optical accessories for handguns and rifles, and high quality LED tactical flashlights. We continuously expand our portfolio and look for just the right product for our customers.