Primary Arms MRSC Micro Reflex Sight with a 21mm lens, AutoLive motion-activated illumination, and a daylight-bright 3 MOA green dot.
The Primary Arms MRSC Micro Reflex Sight is a compact reflex optic designed for small pistols and micro-compact platforms. It features a 21mm lens paired with a daylight-bright 3 MOA green dot and AutoLive motion-activated illumination to conserve battery life. The sight uses the RMSc footprint for broad compatibility with milled slides and adapter plates and houses a bottom-mounted CR2032 battery. Typical applications include concealed carry setups and range training where a low-profile, fast-acquisition optic is desired.
Product Specifications
The manufacturer is Primary Arms.
The model is MRSC Micro Reflex Sight.
The lens measures 21mm.
The reticle is a 3 MOA green dot.
The sight uses a RMSc footprint for compatibility with milled slides and adapter plates.
The power is 1X.
The housing is made from 6061 Aluminum.
The lens is fully multicoated for scratch and fog resistance.
The finish is anodized.
Color is Black.
This sight includes AutoLive motion-activated illumination technology.
The illumination offers 10 total settings with a daylight-bright green dot.
The battery is a bottom-mounted CR2032 cell.
Battery life is up to 40,000 hours on the medium setting.
The UPC is 818500019947.
With its compact 21mm profile, durable 6061 aluminum housing, and a fully multicoated lens, the MRSC balances low sightline mounting with reliable optical clarity. AutoLive and multiple illumination settings reduce battery waste while preserving readiness, making this reflex sight a practical choice for shooters who prioritize discreet carry optics and consistent on-range performance.
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