Primary Arms Classic Series 21mm Micro Reflex Sight - $99.95

Description

The Primary Arms Classic Series 21mm Micro Reflex Sight is designed to bring reliable performance and quick target acquisition to micro-compact pistols, making it ideal for everyday carry. With a 3 MOA daylight-bright red dot, 10 brightness settings, and a fully multicoated lens, this optic provides a crisp, clear sight picture in a wide range of lighting conditions.
Engineered to fit the RMSc footprint, this ultra-compact red dot eliminates slide overhang on small pistols like the Sig P365X/XL, and other slim-frame optics-ready handguns. Its 6061 aluminum housing is built for real-world durability, while a bottom-mounted CR1632 battery powers the sight for up to 40,000 hours. The auto-off feature powers the optic down after 12 hours to conserve battery life, and manual brightness controls allow quick adjustments.
Whether you’re a new shooter or seasoned EDC enthusiast, the Classic Series micro red dot delivers trusted performance without breaking the bank—all backed by the Primary Arms Lifetime Warranty.
Features
3 MOA red dot with 10 brightness settings (8 daylight, 2 night vision)
Fits RMSc footprint – optimized for micro and subcompact pistols
Compact 21mm x 15mm lens for low-profile slide fit
Up to 40,000-hour battery life (CR1632 included)
Auto-off after 12 hours to conserve power
Fully multicoated lens – anti-scratch, anti-fog, and clear optics
6061-T6 aluminum housing with anodized finish
Parallax-free with unlimited eye relief
Lightweight and durable for concealed carry use
Specifications
Reticle: 3 MOA Red Dot
Brightness Settings: 10 (8 Daylight, 2 NV)
Power Source: CR1632 (bottom-loaded)
Battery Life: Up to 40,000 hours
Magnification: 1x
Parallax Free: Yes
Lens Size: 21mm x 15mm
Housing: 6061-T6 Aluminum
Footprint: RMSc
Dimensions: 1.6″ x 0.98″ x 0.95″
Weight: 1 oz
Waterproof Rating: IPX7
Mounting: RMSc-compatible slides or adapter plates
SKU: 17402