HS403R-RD | Holosun (PTA stock)

The letter “R” indicates that the sight uses a rotary dial to adjust reticle brightness instead of the two push buttons found on many other Holosun red dot sights. The dial is located on the side of the optic and also houses the battery compartment.

Although the model name does not include the letter “U,” the HS403R features protected adjustment turrets.

The “RD” designation indicates that the sight uses red illumination.

Key Fetures:

• Crisp 2 MOA red dot
• Red reticle illumination
• Low-profile mount included
• 1.63-inch lower 1/3 co-witness mount included
• Protected adjustment turrets
• Rotary brightness control
• Aimpoint Micro-compatible mounting footprint
• 12 brightness settings
• 10 daylight brightness settings
• 2 night-vision-compatible settings
• Parallax-free optical system
• Unlimited eye relief
• Up to 100,000 hours of battery life at setting 6
• Side-mounted CR2032 battery compartment

ABOUT THE PARALOW SERIES

Paralow is a series of compact red dot sights developed by Holosun. Their small tube-style design is similar to popular Micro red dot sights and provides a lightweight, durable aiming solution for rifles and carbines.

The HS403R is powered by a CR2032 battery and offers 0.5 MOA windage and elevation adjustments. Its durable aluminium housing is designed for reliable use in demanding conditions.

Twelve brightness settings are available, including ten daylight settings and two settings compatible with night-vision devices. Battery life reaches up to 100,000 hours at brightness setting 6.