Osight K (RMSc 6 MOA Green)

The Osight K Green is the green-emitter version of Osight's budget open-emitter RMSc red dot, sized for slim subcompact and micro-compact carry pistols. The 6 MOA dot is the largest single-dot reticle Osight offers, and the green wavelength reads faster than red against dark targets and low-contrast backgrounds for many shooters. Motion sensor activation triggers on the slightest movement and powers the optic down after three minutes of inactivity to conserve battery.

Power is a side-loading CR1620 tray, allowing battery swaps without pulling the optic off the slide and preserving zero. A low-power indicator triple-flashes once per minute when the cell drops below 2.2 V, giving early warning before total dropout. The brightness ladder is the standard Osight 8 daylight plus 2 night-vision arrangement. Construction is 7075 aluminum with a parallax-free aspherical lens and an IPX6 water resistance rating. An RMR-to-RMSc adapter plate is sold separately for full-size optics-ready slides.

Footprint is Shield RMSc, fitting the SIG P365 family, Glock 43X/48 MOS, and other slim optics-ready slides. At $169.99 MSRP the green K carries roughly a $10 premium over the $159.99 red K, the standard cost of a green emitter, and still undercuts green-dot competitors like the Holosun 407K X2 Green. Choose the green K over the red for faster reticle pickup; choose the enclosed SE Green if you want sealed-emitter durability for daily carry.