The Trijicon RMR Lower 1/3 Co-Witness Quick Release Mount in matte finish is a precision optic mount built for shooters who demand a rock-solid red dot platform on their rifle. This lower 1/3 co-witness mount positions your RMR or SRO optic at the ideal height for consistent sight picture over iron sights, making it the go-to choice for tactical rifles, duty guns, and serious sport shooters. Built from 7075-T6 aluminum and finished in durable matte black anodize, it's engineered to withstand the rigors of combat and competition.

What sets this mount apart is its Q-LOC quick release technology and tool-free mounting system. You can install or remove your optic with one hand and no fumbling with Allen keys—critical when every second counts on the range or in the field. The return-to-zero design means you can swap your red dot and trust it will come back to zero. The low-profile footprint keeps your sight line clean and adds minimal weight to your build, while the Picatinny rail compatibility ensures it'll fit any standard upper receiver or rail-mounted platform.

Trijicon machines these mounts domestically and subjects them to mil-spec drop tests, so you're holding something that's proven under stress. The matte finish resists glare and plays well with tactical aesthetics. Whether you're building a duty rifle, a competition gun, or an overland truck gun, this is a no-nonsense mount that gets out of your way and lets your optic do its job.

Key Features

• Lower 1/3 co-witness height for alignment with standard iron sights
• Q-LOC quick release system for tool-free one-handed mounting and removal
• Return-to-zero design maintains zero across mounting cycles
• 7075-T6 aluminum construction with mil-spec drop test rating
• Matte black anodized finish resists glare and corrosion
• Compatible with any standard Picatinny rail
• Made in the USA

Specifications

Frequently Asked Questions

Will this mount work with my RMR and SRO optics?

Yes. This is a universal quick release mount compatible with both Trijicon RMR and SRO red dots. The height specifications differ slightly between the two (1.511 inches for RMR, 1.752 inches for SRO), but the mount accommodates both.

What does lower 1/3 co-witness mean?

Lower 1/3 co-witness positions your optic at a height that allows you to see both your red dot and your iron sights in the same sight picture. This is the standard configuration for tactical and duty rifles where iron sights serve as a backup.

Can I use this on any rifle with a Picatinny rail?

Yes. The mount is designed to work with any standard Picatinny rail, so it'll fit AR-15s, AR-10s, and other rail-equipped platforms.

Do I need tools to install and remove the optic?

No. The Q-LOC quick release system is tool-free and one-handed, so you can mount and unmount your red dot without any hex keys or other tools.