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Osight

OSIGHT K 6 MOA Open Reflex Sight, RMSc Red/Green Dot Sight

  • Based on 610 reviews
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Availability: 15 left in stock
Fulfilled by Amazon
Arrives Tuesday, Sep 29
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Color: Red 6 MOA Dot


Features

  • 6 MOA Red Dot:A 6-MOA dot fosters quicker target acquisition and better visibility, making it ideal in high-stress situations. A larger dot adds consistency to presentation and target alignment.
  • Side-Loading Battery:Effortless battery replacement without removing the optic ensures hassle-free re-zeroing. A premium-grade battery features easy accessibility while maintaining steady performance.
  • RMSc Footprint:Designed for RMSc Footprint-cut, optics-ready slides. Non-RMSc slides require an adapter plate (not included). Please verify compatibility before purchase.
  • Motion Sensor Function:A motion sensor activates the optic at the slightest motion, and powers down after 3 minutes of inactivity to conserve battery.
  • Low Power Indication:If battery voltage drops below 2.2V, the reticle will quickly triple-flash once per minute to recommend an imminent battery replacement.

Description

The Osight K is a compact, high-performance open-sight reflex sight designed for concealed carry and tactical applications, enhancing your accuracy and confidence in every moment. The 6-MOA dot offers better visibility and faster target acquisition, making it ideal in high-stress situations. A larger dot ensures quicker presentation and target alignment, perfect for rapid engagements from the holster. The side-loading battery allows for easy replacement without removing the optic, while the RMSc footprint ensures compatibility with most optics-ready slides. With its automatic motion- activated power system, it instantly turns on with the slightest movement and enters a power-saving standby mode after 3 minutes of inactivity. A rugged CNC-machined 7075 aluminum housing guarantees durability, while its low-deck height enables co-witnessing with factory iron sights. Osight K offers multilayer reflective glass maximizes light transmission, reduces glare, and ensures optimal performance in any condition, making it a versatile optic for both professionals and everyday users.

Brand: Osight


Color: Red 6 MOA Dot


Style: Red 6 MOA Dot


Product Dimensions: 0.98"L x 0.98"W x 1.59"H


Sport: Hunting


Item Weight: 29 g


Material: Aluminum


Compatible Devices: Handgun


Mounting Type: Integral Mount


Thread Type: RMSc


Compatible Devices: Handgun


Mounting Type: Integral Mount


Thread Type: RMSc


Reticle Type: Dot


Item Dimensions L x W x H: 0.98"L x 0.98"W x 1.59"H


Item Weight: 29 g


Color: Red 6 MOA Dot


Product Style: Red 6 MOA Dot


Material Type: Aluminum


Brand Name: Osight


Sport Type: Hunting


Model Name: O-OSIGHTK-RD-300115


Manufacturer: Osight


Item Highlight: Side-Load Battery, Motion Sensor, Micro Dot Sight for Pistol, Parallax-Free Compact Optic for Concealed Carry


Number of Items: 1


Unit Count: 1 Count


Included Components: Adjustment Tool × 1, Battery Compartment Screw x 2, Cleaning Cloth × 1; User Manual × 1; Safety Warnings × 1; READ ME Card × 1, Osight K x 1, Osight Stickers × 1


Model Number: Osight K


Warranty Description: Lifetime Warranty


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Maybe the best RMSc for the money
Color: Red 6 MOA Dot
Have this mounted on a Canik MC9 prime, and it is a perfect and snug fit with the included screws. The buttons can be a little hard to press if you're wearing gloves, but otherwise they function quite well and have a nice tactile "bump" when you depress them. The glass is clear and easy to clean. The laser itself handles all light levels with ease; it gets brighter than the sun at max level, making it perfect for daytime training, while it offers multiple night-modes that I've found very useful in a variety of circumstances and training conditions. Additionally, the added circle and circle-dot reticles you can cycle to are clear and crisp, and I've had a lot of success with the circle dot (though I swear the dot itself sits a little below what should be the center...others say I'm crazy but idk) at longer ranges. It has survived 3 accidental drops on concrete and 3k rounds with no issues other than needing to reapply loktite a few days after first mounting it. I have not noticed any significant zero drift after reapplying the locktite and re-zeroing the pistol - thousands of rounds of various types with no issue. Battery life is outstanding so far, though they make it even easier to swap the battery out so no worries there. For the price, this should jump to the top of the list for anyone looking for an RMSc pattern pistol optic. A homerun for OSIght! ... show more
Reviewed in the United States on April 6, 2026 by Dan N
    • Great Red Dot
Color: Red 6 MOA Dot
One of the best red dots and the price was perfect. Fair brightness and ease of use to install. Size is a little large but no complaints because it’s durable
Reviewed in the United States on August 11, 2026 by Sj
    • Quality optic for cheap
Color: Red 6 MOA Dot
Cheaper than Holosun without giving up quality. I have numerous Osight dots, and can't believe the price for the quality. The red works better than a green imo because it contrasts against more backgrounds and doesn't get as washed out with natural light. I did get a green from them, and while the dot was very crisp, it got lost more easily in daylight. See my review of that one (returned it) to read more about why I returned it and don't think it's good for EDC, and how I compromised with an Osight SE in red for my main carry. If you want a good cheap dot, grab this one (6moa is great for EDC)- if you want fully enclosed get the SE for a bit more. ... show more
Reviewed in the United States on May 31, 2026 by Dean Larson
    • OSight K
Color: Red 6 MOA Dot
Osight makes awesome Red Dot sights!! Mounting this optic was super easy! The value for the money is just unmatched! Fits amazing on smaller pistol platforms like sub and micro compact! The Osight K keeps it simple with a side battery door!
Reviewed in the United States on August 7, 2026 by Duane
    • Excellent Reflex Sight.
Color: Red 6 MOA Dot
Excellent reflex sight. Just about every necessary mounting screw is included. Easy sighting adjustments and the shake awake feature is a real plus. The dot appears sharp to me but my granddaughter claimed it didn't appear round. But she had no problems using it. No shift in sight after a little over 250 rounds so I'd say it holds zero pretty well. Everyone wants the Holosun, which I have, but I can't see any difference between this and the Holosun, except the price. Time will tell but for now this is a good starter sight. ... show more
Reviewed in the United States on July 25, 2026 by migraman
    • Great buy
Color: Red 6 MOA Dot
So far I’m loving it. Battery life is fantastic it’s dutiable as heck. Easy to see in daylight the 6 MOA dot is awesome and more practical the inside of the lense does get dusty and dirty over time but easy to clean with Q tip
Reviewed in the United States on July 29, 2026 by zachary rabideau
    • Holds true
Color: Red 6 MOA Dot
Love this, got it for my canik mc9 prime. Fits perfectly and very easy zero out. It’s stays on my daily carry, have taken to the range 3timrs now and zero is holding perfect.
Reviewed in the United States on September 11, 2026 by Aaron landrum
    • Great optic holds zero
Color: Red 6 MOA Dot
Osight what else can I say. Most people that say negative things either never had one just jump on a bandwagon or got an early launch model. I do firearm reviews and have had 7 different osights and each one worked great. Holds zero survived multiple drop tests onto concrete with no zero shift. Was almost spot on straight out of the box at 7 yards was off maybe two inches elevation. Windage needed no adjustment. I do wish Osight would make a comp size rmsc optic ... show more
Reviewed in the United States on July 17, 2026 by Zachary Colagross

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