OLIGHT Osight K Enclosed Red Dot Sight — Black

The Osight K is a compact enclosed red dot sight from OLIGHT with an RMSc footprint, designed for pistols and compact carbines where space on the slide or rail is limited. Weighing 29 g and measuring 40.4x25x25 mm, it integrates without altering the weapon's balance or compromising co-witnessing with standard iron sights.

The reticle is a red dot of 6 MOA at 660 nm: a diameter suited to fast target acquisition at close range, where speed matters more than millimetre precision. The 21x14 mm window is compact — inevitable on such a small body — and requires a consistent cheek weld or shooting position to keep the dot in the field of view. Those looking for a larger window will need to consider a bigger format, accepting the additional weight and bulk. The windage and elevation adjustment range is ±35 MOA with 1 MOA clicks, sufficient to compensate for typical deviations on pistols and compact carbines.

The power management system combines motion detection, automatic shut-off after 3 minutes of inactivity, and instant reactivation on movement: in everyday use, this noticeably extends the life of the single CR1620 battery, rated at up to 63,000 hours. The memory function retains the last brightness level set, so the optic is ready to go on activation without scrolling through the 10 available levels — 8 for daylight and 2 compatible with night vision devices. Water resistance is rated at IPX6: resistant to direct water jets and suitable for outdoor use in adverse weather conditions.

Key Features

• The RMSc footprint allows direct mounting on pistol slides milled for this standard, eliminating the need for additional adapters.
• The 29 g weight does not alter the weapon's balance and does not interfere with drawing from a holster.
• Automatic shut-off and motion detection keep the battery running for up to 63,000 hours without manual intervention.
• The 2 NV-compatible levels allow use alongside night vision devices without the dot washing out the field of view.
• The memory function eliminates the need to readjust brightness on every activation — useful under stress or in low-light conditions.
• IPX6 certification ensures operation in heavy rain and humid environments.

In the Box

• OLIGHT Osight K red dot sight
• Cleaning cloth
• User manual