The OSM3 is a 45-degree offset Picatinny mount from Red Win Optics, built for RMSc-footprint red dot sights including the Red Win Cobra Mini 3 MOA and 5 MOA. Machined from T6061 aluminum, it mounts to a standard Picatinny or Weaver rail and positions the optic at a right-side 45-degree offset from the primary sighting plane.
The OSM3 is machined from T6061 aluminum in a compact, durable design, with stainless steel socket screw holes built into the mount body. It attaches to a Picatinny or Weaver rail and positions an RMSc-footprint red dot at a 45-degree offset to the right side, giving the shooter a secondary sighting plane alongside a primary optic. A stainless steel recoil-proof alignment pin helps keep the optic indexed under recoil, and the mount uses #6-32 x 7/16-inch stainless screws for attachment.
This mount is built to the RMSc footprint, making it compatible with the Red Win Cobra Mini 3 MOA and 5 MOA models, along with other RMSc-pattern red dot sights. At 42.1 grams net weight, it adds minimal bulk to a build while giving the shooter a 45-degree offset mounting option.
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Brand: Red Win Optics
Model: OSM3
Footprint: RMSc (Shield RMSc compatible)
Compatible Optics: Red Win Cobra Mini 3 MOA / 5 MOA, RMSc pattern red dot sights
Mount Base: Picatinny / Weaver
Offset Angle: 45° (Right-side offset)
Material: T6061 Aluminum
Pins: Stainless steel recoil-proof alignment pin
Screw Type: #6-32 x 7/16" Stainless screws
Construction: Compact, durable design with stainless steel socket screw holes
Weight: 42.1 g (Net)
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