Primary Arms, Classic Micro Reflex Sight, 3 MOA, Black (810044)

Built for your everyday carry, the MRSC is the next evolution in Primary Arms’ red dot lineup—purpose-built for direct mounting on pistol slides. Designed with compact and micro-compact pistols in mind, it features a streamlined 21mm lens that keeps the sight low-profile with no slide overhang, even on the smallest frames.

Don’t let the smaller lens fool you—the square window delivers a wide, clean sight picture that stays clear every time you draw. Running the RMSc footprint, it fits seamlessly on milled slides and adapter plates, giving you flexibility across your setup. A bottom-mounted CR2032 battery powers the optic for up to 40,000 hours on medium brightness, so you can set it and forget it.

With 10 brightness settings—including a daylight-visible 3 MOA red dot—the MRSC is fast, intuitive, and always ready. Fully multi-coated glass resists scratches and fog, while the 6061 aluminum body stands up to hard use.

If you’re running concealed and want a rugged, reliable red dot that won’t weigh you down, the MRSC delivers.