Primary Arms MRSC Micro Reflex | 21mm 3 MOA AutoLive

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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