Trijicon RMR Low Picatinny-Style Mount - Matte Black Tactical Optic Base

The Trijicon RMR Low Picatinny-Style Mount is a purpose-built aluminum base that lets you run a Trijicon RMR red dot sight on any Picatinny-railed upper receiver or handguard. If you're already shooting behind a magnified scope but want the speed of a close-quarters dot for faster target acquisition, this low-profile mount positions your RMR in co-witness or lower-third territory—just a slight rifle rotation away from your primary optic's sight picture. Built from aircraft-grade aluminum and finished in matte black, it's rock-solid without adding unnecessary weight.

Attachment is straightforward: the mount seats directly onto your Picatinny rail and locks down with a full-length clamping bar and two recessed hex-head set screws. That cross-bar design distributes clamping pressure evenly and resists shift and creep under recoil. The grooved thumbscrew is made for fast on-off cycles if you're testing mount placement or swapping between guns—no Allen wrench fumbling required when you're setting up in the field.

This is the RM33 configuration, the low-profile variant. It's favored by hunters and tactical shooters who want a backup dot or a dedicated CQB sighting system without the bulk of a taller offset mount. Whether you're running it on a rifle, shotgun, or carbine with a top rail, it positions your RMR where it belongs: within easy reach of your dominant eye and indexed for speed.

Key Features

• Low-profile aluminum construction for secure, lightweight mounting
• Full-length locking bar ensures even clamping pressure on Picatinny rail
• Two recessed hex-head set screws for tool-assisted lock-down
• Grooved thumbscrew design enables fast, tool-free attachment and removal
• Matte black finish resists glare and blends with tactical setups
• RM33 low-height design positions RMR for co-witness or lower-third use

Specifications

Frequently Asked Questions

Will this mount work with any Trijicon RMR?

Yes, this RM33 mount is designed for all Trijicon RMR red dot sights. Confirm your RMR model before purchase, but the footprint is standard across the RMR line.

Can I use this mount on a handgun or only on rifles and carbines?

This is a Picatinny-rail mount, so it's intended for long guns and other equipment with a top Picatinny rail. For pistol mounting, Trijicon offers different RMR footprint options.

What tools do I need to install this mount?

You'll need an Allen wrench (hex key) to secure the two recessed set screws. The grooved thumbscrew attaches without tools and can be hand-tightened for mounting and removal.

Is this mount low enough to co-witness with my primary magnified optic?

The RM33 is the low-profile variant, positioning the RMR lower on the rail. Whether it achieves true co-witness depends on your primary scope height and rail setup—measure your specific combination before purchase to confirm alignment with your sight picture.