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Osight, founded by Olight in 2021, delivers revolutionary, affordable-yet-quality red dot optics. Designed with expert and customer input, each sight is crafted from durable SUS420 stainless steel. Enjoy universal compatibility, supporting RMSc/K, 407C/507C, and other popular red dot footprints. Swift, easy installation tools are included, embodying Osight’s « SEE THE POWER! » innovation.













Samuel Yu –
Great product
Try to find an adapter to fit my send viper, try different one on the market, it didn’t fit, but come across this item, great price and fit perfect.
John P Shannon Jr –
Fit my aftermarket slide perfectly
I bought this to mount an Osight SE to my Glock 19. Fits perfectly on an aftermarket Glock slide. Osight products are very nice and nicely presented in the packaging they come in. Came with the necessary hardware to mount. I had to trim the screws a bit because they were slightly too long but that’s not problem just a part of gun accessory mounting.
smooth_opr8r –
Good solution to mounting an RMSc Optic to your RMR slide.
I couldn’t find an aftermarket RMSc slide for my Glock 26, so I went with an RMR-cut slide instead. This adapter plate fit my aftermarket RMR slide perfectly, and the included screws did a great job securing it in place. Just a heads-up: if your slide doesn’t accept M3 screws, you may need to source screws with a different thread pattern. My Holosun 407K mounted perfectly on this plate. For $19.99, it’s an excellent value if you’re looking to mount an RMSc optic to an RMR-cut slide.
Bailey Dane winter –
Don’t buy
The screws are too long
onebadapple –
Excellent fit!!
Perfect fit and the included hardware worked perfectly.
Michael Rowe –
Well Made Product – Just Not A Fit For P320 Slides
Well made adapter, but does not fit Sig P320 MOS cutouts.Mine has the Romeo 1 Pro+RMR mounting, but the cutout is too long for this adapter and leaves 1mm+ gaps at the front and back, allowing for the potential for too much stress from cycling and recoil.
bobngso –
Not for Walther PDP
Solid quality, but this plate will not fit a Walther PDP 2.0. Had to return it. Did so with no problem.
tim monahan –
Perfect Fit for Vortex Defender CCW
I needed an adapter plate for my Vortex Defender CCW, and this Osight RMR to RMSc adapter worked perfectly. It fits securely on the slide with no issues, and the multiple screw sizes included made installation easy.Everything lines up exactly as it should, and I haven’t had any problems with fitment. Simple, well-made, and does exactly what it’s supposed to do.