Olight Osight Mount Picatinny-RMA-OSP091 Low-Mount/RMA-OSP157 High-Mount

The Olight Osight Mount Picatinny-RMA-OSP091 Low-Mount and RMA-OSP157 High-Mount set is a precision rail adapter built to lock your Osight or Osight X reflex sight onto any standard Picatinny platform. This two-height mounting solution lets shooters set the optic exactly at the aiming line their rifle and stance call for. It is a small upgrade that makes a big difference in how naturally your red dot sits behind your eye.

What the Olight Osight Mount Picatinny-RMA-OSP091 is and who it is for

The RMA-OSP091 is the low mount, tuned for setups that want a lower, flatter aiming line and a fast, heads-down sight picture. The RMA-OSP157 is the high mount, which raises the optic for shooters who need extra clearance or a more heads-up presentation. Together they give you a choice rather than a compromise.

This adapter suits pistol-caliber carbines, rifles, and any host where cheek weld and optic height decide how quickly you find the dot. If you already run an Olight Osight or Osight X and want a clean, repeatable way to bolt it to a Picatinny rail, this is the piece that gets you there without fuss.

Key features that set this Osight mount apart

Every detail here is aimed at a rock-steady hold on target.

• Two-height design: the RMA-OSP091 low mount for a lower aiming line and the RMA-OSP157 high mount for a raised sight picture.
• Built from 7075 aircraft-grade aluminum alloy for high strength, light weight, and corrosion resistance.
• Reinforced with a sturdy steel base that adds real durability and stability under repeated recoil.
• Two strong clamping screws deliver firm Picatinny rail lockup so the optic holds zero during shooting and movement.
• Compact, low-bulk footprint that is easy to carry and quick to install in the field or at the bench.
• Purpose-built fitment for the Osight and Osight X, so there is no guesswork about compatibility.

Specs and build quality of the Olight Osight Mount Picatinny-RMA-OSP091

Materials tell the story. The design pairs 7075 aircraft-grade aluminum with a steel base, giving you the light weight shooters want without sacrificing the rigidity a red dot mount demands. Steel is the listed base material, and that hard foundation is what keeps the optic from creeping under recurring recoil. The interface is standard Picatinny, so it drops onto the rail you already run.

Both versions share the same core hardware and the same dependable two-screw clamp, so the only functional difference is height. That means you can pick the exact aiming line your rifle wants and still count on the same clamping force and finish. A dedicated mount like this, engineered by Olight for a specific optic, removes the slop and tolerance stacking that plague generic adapters.

Practical use, care, and compatibility

Installation is quick. Set the adapter on your Picatinny rail, snug both screws evenly, and confirm the optic is seated square before you torque down. A drop of thread locker on the screws is cheap insurance for a mount that lives on a working gun, and it keeps everything tight round after round.

Care is easy. Wipe the unit after wet or dusty outings and the anodized surface will shrug off corrosion for years. Compatibility is focused and clear: this adapter is made only for the Olight Osight and Osight X, so pair it with one of those optics rather than forcing a different footprint. Choose the low RMA-OSP091 for flatter, faster shooting or the high RMA-OSP157 when you need clearance, and browse our full optics collection to match it with the right sighting system for your build.

The Olight Osight Mount Picatinny-RMA-OSP091 is a small, honest piece of kit that earns its place on any Osight setup. Ships direct to your door, no FFL required.