American Defense Mfg Ad-Rmr-Lw-L-Std Am Def Rmr Lw Qd Mount Low Lh

The American Defense Manufacturing AD-RMR-LW QD mount is a left-hand quick-detach optic mount purpose-built for mounting Trijicon RMR red dot sights and compatible footprint optics on AR pistols, short-barreled rifles, and other compact weapon platforms. This is a single-piece mount that delivers the low-profile mounting height you need for co-witness or lower 1/3 co-witness alignment with standard AR iron sights, keeping your sight picture intuitive and your setup clean.

Built from 6061-T6 aluminum and finished with hard-coat Mil-Spec anodize, the AD-RMR-LW handles daily use and harder conditions without losing its zero. American Defense's patented QD Auto Lock Lever system accommodates both in-spec and out-of-spec Picatinny rails—a real-world advantage when your mount needs to work on different platforms. The lever itself is fully adjustable, configurable to lock forward or rearward depending on your rail setup and ergonomics preference. No proprietary tools required; adjust with your finger or a flat-blade screwdriver.

The left-hand lever orientation makes this the choice for shooters who operate their quick-detach from the port side, whether for southpaw shooters or those who prefer left-side mounting geometry on ambidextrous builds. Fit it to an RMR, SRO, or any red dot that shares the Trijicon RMR footprint. Whether you're running an AR9 pistol, a defensive rifle with a compact dot, or a precision carbine that demands a lighter optics solution, the AD-RMR-LW keeps sight mass and height minimal where it counts.

Key Features

• Single-piece precision-machined 6061-T6 aluminum construction
• Hard-coat Mil-Spec anodize finish for durability
• Patented QD Auto Lock Lever system fits in-spec and out-of-spec Picatinny rails
• Low and lower 1/3 co-witness optic height options
• Lever configurable to lock front or rear
• Tool-free adjustment with finger or flat-blade screwdriver
• Left-hand lever orientation
• Compatible with Trijicon RMR, SRO, and similar RMR-footprint red dots

Specifications

Frequently Asked Questions

What red dot sights will fit this mount?

The AD-RMR-LW accepts the Trijicon RMR, Trijicon SRO, and any red dot optic that shares the Trijicon RMR mounting footprint. If you're unsure whether your optic fits, verify the footprint matches the standard RMR pattern.

Is this mount compatible with out-of-spec Picatinny rails?

Yes. The patented QD Auto Lock Lever system is designed to accommodate both in-spec and out-of-spec rail systems, which means better compatibility across a wider range of receivers and upper assemblies than many competitors' mounts.

Can I adjust the lever position without special tools?

Correct. The lever can be adjusted using your finger or a standard flat-blade screwdriver. You can also reconfigure it to lock to the front or rear of the mount to suit your preferred mounting geometry and rail fit.

What is the difference between "low" and "lower 1/3 co-witness"?

This mount offers both optic height options: low (below AR iron sights line of sight) and lower 1/3 co-witness (optics sit in the lower third of your rear sight window). Consult the product manual or contact us to confirm which configuration your specific mount provides.