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Product Videos
Customer Reviews
Helpful Positive Review
Inexpensive and functional by Corndog Racing, Verified Owner, January 10, 2026
Great little red dot. Holds true. Screws sent are too long for aftermarket Glock rmr cut slides. Dremel tool fixed that. Definitely a good budget red dot. Only complaint is Optics Plant has got to be the slowest shipper in the industry. In this day a...
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5/5 found this helpful
Helpful Positive Review
Great Value by David Snell, Verified Owner, January 8, 2026
This is my first pistol red dot. It's simple to use and the 6mm dot is easy to see. It fits great on the Black Rain Ordinance Frontline with the olight adapter plate. Small and compact enough for EDC. Don't sleep on the olight products the are qualit...
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2/2 found this helpful
Helpful Positive Review
Great value by Nicholas Darius Idos, Verified Owner, January 30, 2026
I have used Holosuns. This a great alternative. For the price, it is as durable and the glass is clearer with a more crisp red dot.
2/2 found this helpful
Most Recent Reviews
Red Dot 305 by Knights, Verified Owner, April 4, 2026
Best red dot ever. I put it on my sig m17 and it fit perfect
Most Recent Reviews
Great optic for the price by O my light, Verified Owner, March 28, 2026
Quality packaging gave it up right there. Different sized screws in a plastic container. Attention to detail was done here. As for functionality, it was zeroed in out of the box. The different brightness settings were helpful and the 6MOA dot was ni...
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Most Recent Reviews
Very good optic for the money by sycosys91, Verified Owner, March 23, 2026
Seems very solid, and I really like that it has a replaceable battery and not a rechargeable one that will one day fail. Definitely recommend the larger dot for faster target acquisition.
Read All 7 Reviews
Color:
Black
Reticle:
6 MOA Dot
Illumination Color:
Red
Red Dot Sights-Footprint:
RMSc

Code: 6QK-RD-OLHRD2-6978095650179

MPN: 6978095650179

UPC: 6978095650179

$159.99

Product Info for Osight K 1x 21x14mm Reflex Red Dot Sight

The Osight K is a versatile dot sight featuring a crisp 6 MOA red dot and 10 brightness settings. Compared to its predecessors, the Osight K uses an easily replaceable battery, so you're always ready to go without waiting for a charge or dealing with the hassle of a charging cover. The Osight K offers 10 brightness settingstwo optimized for night vision and eight for daytime use. The aspherical lens provides zero distortion and parallax-free performance, delivering exceptional clarity through the large window for quick target acquisition. The optic is easy to zero in with both windage and elevation adjustments, ensuring consistent accuracy. The Osight K also includes a motion sensor that activates with movement and powers down after 3 minutes of inactivity (this feature can be disabled if desired).Powered by a CR1620 battery, the Osight K offers up to 63,000 hours of runtime at the lowest daytime brightness. When its time to replace the battery, the reticle blinks three times every minute to indicate the need for a swap. To replace it, simply unscrew the side battery housing and pull out the side battery loader for quick access. Compact and lightweight, the Osight K measures just 1.59 inches in length and weighs only 1.02 ounces, keeping a low profile. With an IPX6 waterproof rating and a durable 7075 aluminum housing, its built to deliver reliability and toughness in any environment.image

Specifications for Osight K 1x 21x14mm Reflex Red Dot Sight:

Manufacturer: Osight
Color: Black
Fabric/Material: 7075 Aluminum
Magnification: 1 x
Objective Window Size: 21x14 mm
Reticle: 6 MOA Dot
Illumination Type: LED
Illumination Color: Red
Brightness Settings: 10
Eye Relief: Unlimited
Adjustment Click Value: 1 MOA
Emitter Type: Open
Parallax: Parallax Free
Battery Type: CR1620
Operating Temperature: -22 - 140 Fahrenheit
Water Resistance Level: IPX-6
Length: 1.59 in
Width: 0.98 in
Height: 0.98 in
Weight: 1.02 oz
Red Dot Sights-Footprint: RMSc

Features of Osight K 1x 21x14mm Reflex Red Dot Sight

  • Features a 6 MOA red dot
  • Features 10 brightness settings: 2 for night vision, 8 for daytime use
  • Activate the motion sensor function to turn on the optic with any movement
  • Easy to remove battery so you don't have to rely on charging

Package Contents:

  • Osight K 1x 21x14mm Reflex Red Dot Sight
  • Adjustment Tool
  • 3 M310.5 mm Screws
  • 3 M311.5 mm Screws
  • 3 M49.4 mm Screws
  • 3 M410.5 mm Screws
  • 3 #6-320.433 in Screws
  • 3 #6-400.374 in Screws
  • 3 #6-400.449 in Screws
  • 2 Spare Battery Compartment Screws
  • Screw Box
  • Osight Stickers
  • Cleaning Cloth

Osight K 1x 21x14mm Reflex Red Dot Sight Orderable Models

List of Orderable Models

  • Osight K Reflex Red Dot Sight, 1x, 21x14mm, 6 MOA Dot, Black, 6978095650179 , MPN: 6978095650179 , UPC: 6978095650179 , Code: 6QK-RD-OLHRD2-6978095650179
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