Holosun HS403R 403 1×20 mm 2 MOA Red Dot

The Holosun HS403R 403 Black Anodized 1 x 20 mm 2 MOA Red Dot is a 20mm micro red dot sight designed for rifle and carbine applications. It provides a 2 MOA aiming point and an adjustable reticle intensity for rapid target acquisition.

Built to offer a compact, lightweight aiming solution, the HS403R addresses the need for a low-profile, reliable sighting option on short- to medium-length rifle platforms. It is suitable for users who require a simple, repeatable point of aim on carbines and rifles, and includes mounting options for lower 1/3 co-witness and low-comb height setups.

• 2 MOA red dot reticle for precise point-of-aim
• 1x magnification with a 20 mm objective (tube diameter 20 mm)
• Rotary intensity switch with 10 daylight and 2 night-vision compatible settings
• Holosun Red Super LED rated for approximately 50,000 hours of battery life
• Integrated CR2032 battery compartment built into the rotary switch
• Durable cast aluminum housing with black anodized finish
• Includes lower 1/3 co-witness mount (1.63) and a low mount (.75) for low-comb height rifle applications
• Multi-coated optics with rubber lens covers included
• Windage and elevation adjustable; 0.50 MOA adjustment size

Specifications & Construction

• Materials: cast aluminum housing; black anodized finish
• Optic Coating: Multi-Coated
• Objective / Tube Diameter: 20 mm
• Magnification: 1x
• Dot Size / Reticle: 2 MOA red dot
• Length: 2.57″
• Weight: 2.82 oz
• Battery: CR2032 (battery compartment integrated into rotary switch)
• Adjustment Size: 0.50 MOA (windage/elevation adjustable)
• Durability: Waterproof

Compatibility & Intended Use

The HS403R is intended for use on rifles and carbines and includes mounts geared toward common co-witness and low-comb height rifle applications. Typical installations include a primary close-range red dot on a carbine or a low-profile sight for low-comb cheek weld setups. Its compact size and mounting options make it appropriate for a variety of short-range aiming setups.