Holosun HS403R

Compact and Reliable 20mm Micro Red Dot

The Holosun HS403R is a rugged, compact 20mm micro red dot sight designed for rifles and carbines. Featuring a precise 2 MOA dot reticle, this optic delivers rapid target acquisition and enhanced accuracy for both professional and recreational shooters. It is fully parallax-free, offers unlimited eye relief, and is submersible up to 1 meter—making it dependable in any environment.

Rotary Switch Design and Battery Efficiency

The HS403R stands out with its rotary switch control that integrates both brightness adjustment and battery compartment in a single ergonomic design. With 12 brightness settings (including night vision compatibility), this sight adapts to any lighting condition. Powered by a single CR2032 battery, the optic provides up to 50,000 hours of runtime on a medium setting, ensuring long-lasting reliability in the field.

Versatile Mounting Options

Each Holosun HS403R includes both a lower 1/3 co-witness mount and a low-profile mount, offering flexibility for a variety of firearm configurations. Whether used on an AR-15 or a pistol-caliber carbine, the HS403R maintains zero under recoil and performs flawlessly in dynamic shooting environments.

Optical Clarity and Build Quality

Constructed with a durable aluminum housing and multi-coated lenses, the HS403R provides exceptional light transmission and minimal glare. Its lightweight build and resilient design make it ideal for range sessions, training, or duty use—delivering consistent performance in every scenario.

Included Accessories:

Lower 1/3 co-witness mount, low-profile mount, rubber lens cover, T10 L key, CR2032 battery, lens cloth, and user manual.

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