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Reviews & Ratings for Osight S 1x21mm Reflex Red Dot Sight
— 6 reviews — Page 1
Shockingly good deal from Optics Planet. I wasn't in the market for an expensive red dot or one with the battery under it needing to be replaced by removing the dot and needing realignment to work. This is a fantastic idea and inexpensively the best option for a trial dot. Easy installation and easy zero with just adjusting to the fixed sights. Works great in direct sun and in moonlight.
by
Kaden,
Verified Owner
from MI, United States
Written on December 7, 2025
I have used several optics now. Sig Romeo X enclosed, Vortex Defender, Romeo zero. For the price point of this, as an enclosed emitter, reticle is very sharp, build quality is great, direct mount to Glock 43x MOS without plate. It punches well above its weight class. Would highly recommend and would buy again.
Pros:
Enclosed Emitter
direct attach no adapter plate
multi retical
Cons:
Auto Brightness feature is too dim for Daylight
Would recommend: Yes
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by
CSW,
Verified Owner
from NH, United States
Written on November 22, 2025
While I have not mounted yet, the features and clarity of this RDS are incredible. Appears to be very strong construction, and was easy to understand it's options. Going to be terrific on my 19MOS.
Would definitely consider another for my Shield.
Pros:
Design & Build
Qualify of design, machining and materials
Cons:
None yet .
Best Used for:
CCW
Would recommend: Yes
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by
Antonio,
Verified Owner
from ND, United States
Written on October 28, 2025
fits great. Easy install. Direct fit for Glock 43x. Nice site picture. Easy zero. Instructions are very minimal, pretty much useless. Will take some tinkering to get used to all of the features.
Pros:
Price
Fit
Looks
Cons:
User manual
Would recommend: Yes
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by
Jerry,
Verified Owner
from NJ, United States
Written on October 22, 2025
Very easy to setup and install. I recommend an inch pound torque screwdriver but it cant be misaligned without one. OpticsPlanet actually sells this for less than the manufacturers website. It defiantly fits a 365 giving you better control on a micro 365 9mm. You will have much better groups and faster follow-up shots compared to original setup. Delivery was fast and everything you need is in one box, the screws are probably worth the price alone and are also included. If your looking for something special, this is it. The best dot setting is the circle + dot giving easy follow-ups. I will be using this as my weekday EDC.
Pros:
No battery
easy zeroing
Everything in one box
very good dot, dat or night
3 different dot's in one sight
Sits flat on a 365
Cons:
Torque screwdriver needed
Best Used for:
EDC
Would recommend: Yes
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by
HSM Tactical,
from FL, United States
Written on October 10, 2025
Excellent compact optic for the price I have this installed on a full size Springfield Armory Echelon 4.5 f I like compact red dots on full size pistols for the fact that I don't have a big bulky Mass protruding from my firearm for a compact sight with all the features that this one possesses it's perfect the sight picture window is large and clear I would absolutely purchase this product again
Pros:
Large clear open sight picture long lasting internal battery with external magnetic charging case extremely durable holds perfect zero after the drop test and illuminated optic is crisp and clear with three different reticle settings and 10 different brig
Cons:
None
Best Used for:
Perfect concealed carry optic
Would recommend: Yes
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