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Cameras & Optics > Optics > Scopes > Weapon Scopes & SightsAmerican Defense MfgSold by Mile High Shooting Accessories
American Defense: Trijicon MRO Mount 1/3rd Co-Witness
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$92.00
List Price: $109.99
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SKU: AD-MRO-11-TAC-R
Overview
Built for mounting a Trijicon Miniature Rifle Optic, this mount is intended for shooters who want a lower, co-witness, or lower-third co-witness setup. Its quick-detach Auto Lock lever system is designed to work with both in-spec and out-of-spec rail systems, and it can be adjusted without proprietary tools. Precision-machined from 6061 T6 aluminum and finished with a hard coat Type 3 Mil-Spec anodize, it is aimed at hard-use rifle setups where a secure, adjustable interface matters. The lever can be configured to lock forward or rearward, offering flexibility for different preferences and rail configurations.
Why Hunters Choose the American Defense Mfg
Trijicon Mro
Lower, co-witness, and lower-third co-witness
Patented Qd
Auto Lock lever system supports
Adjustable Without
Proprietary tools; finger or flat
Configurable Lever
Lock direction offers front or
Precision Machined
Hard coat Type 3 anodize
Key Features
- Designed for the Trijicon Miniature Rifle Optic with lower, co-witness, and lower-third co-witness height options.
- Patented QD Auto Lock(TM) lever system supports quick attachment and removal.
- Adjusts without proprietary tools; can be set with a finger or flat blade screwdriver.
- Lever can be configured to lock to the front or rear.
- Precision CNC machined from 6061 T6 aluminum with hard coat Type 3 Mil-Spec anodize finish.
- Fully adjustable for both in-spec and out-of-spec rail systems.
Best Used For
- Hunters mounting a Trijicon MRO on rifles set up for lower-third co-witness sighting.
- Users needing quick-detach mounting for in-spec or out-of-spec rail systems.
- Rifle owners who want tool-free adjustment with finger or flat-blade screwdriver.
- Shooters preferring a mount that can lock to the front or rear.
- Field users seeking a compact optic mount with adjustable rail engagement.
Specifications
| Adjustment Method | finger or flat blade screwdriver |
|---|---|
| Blade Finish | hard coat type 3 Mil-Spec anodize |
| Clamping Surface | Superior clamping surface |
| Co Witness Height | lower, co-witness or lower-third co-witness (lower 1/3 being a taller height) |
| Compatible Optic | Trijicon Miniature Rifle Optic (MRO) |
| Construction | precision CNC machined from a block of 6061 T6 aluminum |
| Country Of Origin | Made In The U.S.A. |
| Lever Configuration | lock to the front or the rear |
| Material | 6061 T6 aluminum |
| Mounting System | Patented QD Auto Lock(TM) Lever system |
| Rail Compatibility | in-spec and out-of-spec rail systems |
| Tool Requirement | No proprietary tools required |
| Warranty | lifetime warranty |
Pros
- Designed for Trijicon MRO optics with lower, co-witness, and lower-third co-witness heights.
- Patented QD Auto Lock lever system supports quick attachment and removal.
- Adjustable without proprietary tools; finger or flat blade screwdriver works.
- Configurable lever lock direction offers front or rear setup options.
- Precision machined from 6061 T6 aluminum with hard coat Type 3 anodize.
- Fully adjustable for both in-spec and out-of-spec rail systems.
Considerations & Trade-offs
- Designed specifically for the Trijicon Miniature Rifle Optic, so it is not a universal mount for other optics.
- The lower 1/3 co-witness height is a deliberate setup choice and may not suit shooters who prefer a different sight picture.
- The quick-detach lever is adjustable and tool-free, but that also means setup and lock orientation should be checked for your rail and preference before use.
- The mount is built around 6061 T6 aluminum with hard coat anodize, which is a practical, durable configuration but not a lightweight minimalist option by description alone.
Suggested Comparisons
- Optic mounts for red dot sights
- Quick-detach rail mounts
- Co-witness mounting solutions
- Rifle optic accessories
Suggested Accessories
- Optic mounting hardware
- Picatinny rail accessories
- Torque tool
- Lens cleaning kit
Frequently Asked Questions
What optic is this mount designed for?
It is designed for the Trijicon Miniature Rifle Optic (MRO).
What co-witness height does this mount provide?
The product is described as a lower, co-witness, or lower-third co-witness mount, with lower 1/3 noted as the taller height.
Does it require special tools for adjustment?
No. The mount does not require proprietary tools and can be adjusted with your finger or a flat blade screwdriver.
Will it work with different rail systems?
According to the product data, it is fully adjustable to fit both in-spec and out-of-spec rail systems and uses the Patented QD Auto Lock(TM) Lever system for that purpose.
What materials and finish are listed for this mount?
It is precision machined from 6061 T6 aluminum and finished in hard coat type 3 Mil-Spec anodize.