Holosun HS503R

The Holosun HS503R is a compact 20 mm micro red-dot reflex sight engineered for rifles, carbines, and tactical platforms that demand fast target acquisition and dependable performance. Offering true 1× magnification and a parallax-free optical system, this optic provides shooters with a customizable aiming solution through Holosun’s Multiple Reticle System (MRS). Users can switch seamlessly between a precise 2 MOA dot, a rapid-acquisition 65 MOA circle, or a combined circle-dot reticle — without re-zeroing.

Built for extended use, the HS503R delivers up to 100,000 hours of battery life from a single CR2032 cell. Its rotary control dial allows intuitive operation and quick brightness adjustment, while the side-mounted battery compartment simplifies battery replacement in the field. With 12 total brightness settings (10 for daylight and 2 night-vision-compatible), this optic adapts easily to any lighting environment.

The sight is housed in a rugged 6061-T6 aluminum body and sealed to an IP67 rating, ensuring complete protection against dust and water immersion. Combined with unlimited eye relief, parallax-free viewing, and a clear, crisp reticle, the HS503R excels in both precision shooting and rapid engagement scenarios. It’s a reliable, lightweight solution for modern sporting rifles and duty weapons alike.

Features

• Multiple Reticle System (MRS): switch between 2 MOA dot, 65 MOA circle, or combined circle-dot reticle
• 20 mm objective lens: compact and optimized for micro-optic platforms
• 1× magnification with unlimited eye relief and parallax-free aiming
• 100,000-hour battery life on medium setting (CR2032)
• Rotary brightness control and battery compartment for fast operation
• 12 brightness levels: 10 daylight and 2 night-vision compatible
• Durable 6061-T6 aluminum housing with IP67 water and dust resistance
• Includes lower 1/3 co-witness mount and low-profile mount for flexible setup

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