Quantity in Stock: Osight K Open Reflex Sight — Redefine Precision. Demand Performance.
The Osight K is purpose-built for concealed carry and everyday defense. A bold 6 MOA dot speeds up target acquisition from the holster, while the side-loading CR1620 battery lets you swap cells without losing zero. With an RMSc footprint, low deck height for clean co-witness, and a 7075-T6 aluminum housing, this micro red dot is a rugged, duty-ready upgrade for optics-ready pistols.
Why Shooters Choose the Osight K
- 6 MOA Dot: Bigger dot = faster pickup under stress; ideal for defensive distances.
- Side-Loading Battery: Easy battery changes—no re-zero required.
- RMSc Footprint: Direct-mount compatibility with popular optics-ready slides.
- Motion Sensor: Auto-wake on movement; standby after 3 minutes to save power.
- 10 Brightness Levels: 8 daylight + 2 night-vision settings for any condition.
- Multi-Layer Glass: High transmission, reduced glare, and excellent durability.
- Rugged 7075-T6 Housing: CNC-machined strength with everyday carry weight.
- Low-Deck Height: Co-witnesses with most factory iron sights.
Technical Specifications
| Reticle | 6 MOA Dot (Red, 660 nm) |
| Magnification | 1× (parallax-free, unlimited eye relief) |
| Adjustment / Range | 1 MOA per click / ±35 MOA |
| Brightness Settings | 10 total (8 Daylight + 2 NV) |
| Power / Runtime | CR1620 (side-load) / up to 63,000 hrs (Mode 3) |
| Footprint | RMSc |
| Window Size | 0.83″ × 0.55″ (21 × 14 mm) |
| Dimensions (L × W × H) | 1.59″ × 0.98″ × 0.98″ (40.4 × 25 × 25 mm) |
| Weight | 1.02 oz (29 g) |
| Housing / Waterproof | 7075-T6 Aluminum / IPX6 |
What’s Included
- Osight K Optic (CR1620 battery installed)
- Adjustment Tool, Cleaning Cloth, Stickers, Safety Warnings
- READ ME Card & User Manual
- Screw Box with multiple mounting sets (M3, M4, #6-32, #6-40) + 2 spare battery-compartment screws
Mounting Note: Apply medium (blue) threadlocker and torque to 15–17 in-lbs. If using an adapter plate, follow the plate manufacturer’s instructions.
Warranty & Support
Backed by a Lifetime Warranty. Questions on fitment or setup? Our veteran-owned RTB team is here to help.
