Trijicon RMR® Type 2 Red Dot Sight

Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, competitive shooter.

The Trijicon RMR Type 2 is a slide-mounted reflex sight built to survive the reciprocating mass and barrel unlock forces that destroy lesser optics. Trijicon patterns the housing with a geometry that channels impact energy away from the objective lens — a patented approach validated across hundreds of thousands of duty pistols and carbine applications. You mount this optic on a pistol slide, it holds zero through ten-thousand-round courses, and the dot remains centered when you present from the holster. That engineering fact separates the RMR from optics designed for static rifle rails.

Glass & Internals

Trijicon machines the RMR housing from forged 7075-T6 aluminum, then applies a Type III hard-anodize finish rated to MIL-A-8625. The objective lens sits in a cup that floats on elastomer bushings — when the slide cycles, those bushings compress and the housing flexes around predetermined stress risers, keeping the glass intact. Eight brightness settings span from setting one (night-vision compatible at 0.8 lux) through setting eight (daylight readable at 12,000 lux). The adjustable LED model adds side-mounted tactile buttons: one cycles brightness up, the other cycles down, and a long press on both toggles between manual and automatic modes. In automatic mode, a photocell samples ambient light every 0.5 seconds and adjusts the dot to match. In manual mode, the user sets brightness and the RMR holds that setting for 16.5 hours before defaulting back to automatic — a failsafe that ensures the optic powers on at the correct brightness even if the buttons were pressed inadvertently during storage.

The Numbers

The RMR Type 2 retains the same physical dimensions and mounting-hole pattern as the original Type 1, ensuring drop-in compatibility with existing slide mills and adapter plates. Trijicon produces three dot sizes: 1.0 MOA for precision work at distance, 3.25 MOA as the general-duty standard, and 6.5 MOA for close-quarters speed. All three ship with the same adjustable LED circuit and the same battery life — four years of continuous operation at setting four, the midpoint brightness. You can compare slide-mounted reflex sights and mounting hardware in our Trijicon RMR category.

Who It’s For

You choose the RMR Type 2 when zero retention through ten-thousand-plus slide cycles is not negotiable. Federal agents running Glock 19 Gen5 MOS pistols, competitive USPSA Carry Optics shooters chasing sub-second splits, and rifle builders mounting the RMR as a secondary offset on 11.5-inch carbines all run this optic for the same reason: it does not shift. The 1.0 MOA dot suits shooters who engage steel at 50+ yards or need to thread rounds between no-shoot targets in competition. The 3.25 MOA dot balances speed and precision for general carry and duty use. The 6.5 MOA dot prioritizes acquisition speed in close quarters. All three models use the same housing and the same battery — you pick dot size based on your engagement envelope, not durability or feature set.

Installation Notes

Direct-milled slides (Glock slides cut by reputable machine shops, Smith & Wesson M&P CORE, CZ P-10 Optics-Ready) accept the RMR with two 6-32 screws torqued to 18 inch-pounds. Factory adapter-plate pistols (Glock MOS, Springfield OSP, Walther PDP, H&K VP9 Optics Ready) require Trijicon mounting kit AC32064 to achieve proper seating height and screw engagement — the factory plates place the RMR too high and the stock screws do not reach threads. Apply a drop of blue Loctite 242 to each screw, torque to spec, and verify zero at 15 yards before carrying. Battery replacement requires a T15 Torx driver to remove the top cover — the optic does not need to be removed from the slide. Check battery voltage annually; replace when the low-battery indicator (a flashing dot) appears. Store the RMR in automatic mode so it powers on at the correct brightness.