What is a 1/3 co-witness mount?

A 1/3 co-witness mount positions your optic so that the iron sights appear in the lower third of the sight picture, allowing backup visibility without obstructing your view.

Will this mount fit my AR-15?

Yes, the Trijicon MRO 1/3 co-witness mount is designed to fit standard Picatinny rails commonly found on AR-15 platforms and other tactical rifles.

Is installation complicated?

Not at all. This mount installs with standard tools and requires no gunsmithing. It's quick and easy to set up.

Does this mount affect zero or accuracy?

No, it's precision-machined to maintain your zero. Once installed properly, it holds alignment under recoil and rough use.

Trijicon MRO 1/3 Co-Witness Mount – Precision AR15 Mount

**Trijicon MRO Lower 1/3 Co-Witness Mount - AC32069** $50.96

**ZRODelta DLOC-MRO 1/3rd Co-witness Mount** $112.50

**Geissele Super Precision MRO Mount Lower 1/3 Co-Witness - DDC** $155.00

**Geissele Super Precision MRO Mount , Lower 1/3 Co-Witness - Black** $147.90

**Midwest Industries Trij Mro Lower 1/3 QD Mount** $105.00

**American Defense Trijicon Mro Lw Qr Lower 1/3** $113.74

**Reptilia DOT Mount for Trijicon® MRO – Lower 1/3 Co-Witness – 39mm Height – FDE** $85.46

**Reptilia DOT Mount for Trijicon® MRO – Lower 1/3 Co-Witness (39mm Height) – Black** $85.46

Trijicon MRO 1/3 Co-Witness Mount – Built for Precision and Durability

Looking for the perfect Trijicon MRO 1/3 co-witness mount to elevate your setup? Whether you're upgrading your AR-15 or building a new tactical rifle, this lower 1/3 co-witness mount offers the precision alignment and rugged build you need for serious shooting.

Why Choose a 1/3 Co-Witness Mount?

A lower 1/3 co-witness setup allows your backup iron sights to sit just below your optic’s sight picture. In high-stress environments or competitive shooting, this setup makes transitioning between optics and irons fast and intuitive. It's ideal for shooters who demand both redundancy and speed.

Engineered Specifically for the Trijicon MRO

This mount isn’t a one-size-fits-all solution—it's precision-machined for the Trijicon MRO. That means rock-solid stability, zero shift under recoil, and easy installation with standard tools. It aligns perfectly to give you consistent, repeatable accuracy every time you shoulder your rifle.

Key Features & Benefits

Lower 1/3 Co-Witness Design – Ensures optimal alignment with iron sights for faster target acquisition
Precision Machined Aluminum – Built to endure hard use on duty, at the range, or in the field
Lightweight but Tough – Keeps your setup lean without sacrificing performance
Easy to Install – No special tools or gunsmithing required
Compatible with AR-15 and Other Tactical Platforms – Designed for shooters who demand versatility

Compatible with Leading Firearm Setups

Whether you're mounting on an AR-15, M4, or similar tactical rifle, this mount gives your Trijicon MRO the elevation it needs to maximize visibility and comfort. It’s also compatible with most standard rail systems.

What Real Shooters Are Saying

“Finally found the perfect lower 1/3 mount for my MRO. It locks tight, installs fast, and keeps my zero. Love it.” — Mark T.

“This mount transformed my AR setup. Iron sights sit right below the red dot — exactly what I needed for range and home defense.” — Chris M.

Ready to Upgrade?

Don’t compromise your accuracy or your gear. Add the Trijicon MRO 1/3 co-witness mount to your cart today and experience professional-grade alignment that’s trusted by competitive shooters, law enforcement, and military professionals alike.