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Osight SE MOS Direct-Mount Enclosed Emitter Red Dot Sight - 21155-RED
Product Description
The Osight SE MOS Enclosed Emitter Red Dot Sight delivers an innovative direct-mount optic solution designed specifically for full-size GLOCK® Modular Optic System (MOS) slide cuts. By mounting directly into the factory MOS footprint without an intermediary adapter plate, the SE MOS removes an additional mechanical interface, eliminating plate-height elevation issues and potential zero-shift under rapid recoil schedules. Sitting lower over the bore axis, this direct mechanical connection enables an effective co-witness with factory-height GLOCK iron sights.
Constructed with a fully sealed, enclosed housing milled from 7075-T6 aircraft-grade aluminum, the optic protects the LED emitter from rain, dust, lint, and carbon fouling. The optical system utilizes a single-piece aspherical lens that minimizes edge distortion while offering a crisp 21x14mm viewing window. Powered by an accessible side-loading CR1632 battery tray, user battery swaps can be performed seamlessly without removing the optic body from the slide, preserving your established zero.
Featuring a versatile Multi-Reticle System (MRS), operators can toggle between a precise 2 MOA red dot, a 32 MOA speed ring, or a combined circle-dot configuration. Equipped with motion-sensing activation, brightness memory, and an inverted emitter architecture that reduces light reflection and glare, the Osight SE MOS is built for duty-ready concealed carry, defensive staging, and dynamic range operations.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Direct-mount fitment for full-size GLOCK® MOS slides (G17, G19, G34, G45 MOS models). Will NOT fit slimline GLOCK 43X/48 MOS models or non-MOS slide profiles without custom machining.
- Verify the firearm is fully unloaded, clear the chamber, and lock the slide to the rear before installation.
- Clean the GLOCK MOS slide pocket and threaded holes using isopropyl alcohol to ensure a grease-free mounting surface.
- Apply non-permanent threadlocker (Blue Loctite 242/243) to the included mounting screws. Position the SE MOS sight directly into the slide cut and torque fasteners evenly to 15 in-lbs using a calibrated torque wrench.
Key Features
- Direct MOS Mounting: Bolts directly to GLOCK® MOS slides without adapter plates for an ultra-low height over bore.
- Fully Enclosed Emitter: Sealed housing protects the LED diode against water, dirt, sweat, and carbon ingress.
- Multi-Reticle System (MRS): Select between a 2 MOA dot, 32 MOA circle, or combined circle-dot reticle.
- Side-Loading Battery Tray: Houses a CR1632 battery that changes externally without losing sight zero.
- Factory Sight Co-Witness: Low-profile deck height aligns cleanly with standard factory-height GLOCK iron sights.
Product Specifications
- Brand: Osight (Olight)
- Model: Osight SE MOS Direct-Mount Enclosed Red Dot
- MPN: 21155-RED
- Footprint: Direct GLOCK® MOS
- Reticle Type: 2 MOA Red Dot & 32 MOA Circle
- Housing Material: 7075-T6 Billet Aluminum
- Window Dimensions: 21 mm x 14 mm
- Battery Type: CR1632 (Side-Loading)
- Mass: 1.59 oz (45.0 g)
