The American Defense AD-MRO-LW QD Mount is a lightweight quick-detach mount purpose-built for the Trijicon MRO — around 20% lighter than ADM’s standard MRO mount — this version at lower 1/3 co-witness height, placing the dot slightly above AR-height iron sights. ADM’s patented Auto Lock QD lever attaches and removes the optic fast with repeatable return-to-zero, and self-adjusts to in-spec and out-of-spec Picatinny rails without tools.
Machined from 6061-T6 aluminium with a Type III Mil-Spec hardcoat anodised finish. Made in the USA.
Height: Lower 1/3 Co-Witness — also available in Absolute Co-Witness, or with a low-profile TAC lever as the AD-MRO Low TAC.
How It Compares
Running an RMR/SRO or DeltaPoint Pro instead? See the AD-RMR-LW mount or AD-TR-LW mount; for Holosun AEMS see the AD-AEMS mount. Browse all red dot mounts; read our co-witness heights guide.
Ideal For
- Trijicon MRO optics on rifles/carbines
- Lower 1/3 Co-Witness setups with AR-height iron sights
- Weight-conscious builds wanting quick-detach with return-to-zero
Key Features
- Purpose-built for the Trijicon MRO
- Lightweight design (~2.2 oz) — around 20% lighter than the standard ADM MRO mount
- Lower 1/3 Co-Witness height
- ADM patented Auto Lock QD lever; fits in/out-of-spec rails; return-to-zero
- 6061-T6 aluminium, Type III Mil-Spec hardcoat; made in the USA
Technical Specifications
| Fits |
Trijicon MRO |
| Mount |
Picatinny (Auto Lock QD) |
| Height |
Lower 1/3 Co-Witness |
| Weight |
~2.2 oz |
| Lever |
Standard |
| Material |
6061-T6 aluminium, Type III hardcoat |
| SKU / MPN / UPC |
AD-MRO-LW-11-STD / AD-MRO-LW-11-STD / 810008519134 |
| Brand |
American Defense Mfg. (USA) |
What’s Included
- American Defense AD-MRO-LW QD mount (lower 1/3 co-witness)
- Mounting hardware
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and the manufacturer’s lifetime warranty.
Frequently Asked Questions
Which optic does it fit?
The Trijicon MRO (Miniature Rifle Optic).
What does lower 1/3 co-witness mean?
The dot sits slightly above AR iron sights, with the irons visible in the lower third of the window.
Does it return to zero?
Yes — the Auto Lock QD lever gives repeatable return-to-zero.
