Holosun HS507C-X3-RD-MRS Red Dot Sight

The Holosun HS507C-X3-RD-MRS (507C X3) Red Dot Sight is a compact, RMR-footprint pistol optic built for modern handguns. Featuring Holosun’s Multi-Reticle System (MRS) with a 2 MOA dot and 32 MOA circle, it delivers fast target acquisition, precise aiming, and adaptable performance for concealed carry, duty, and range use.

The 507C X3 updates the proven 507C platform with a reinforced 7075-T6 aluminum housing, enhanced brightness control, and intelligent solar-assisted power management. A forward-facing photodiode works in conjunction with Solar Failsafe™ to automatically adjust reticle brightness based on ambient light when in Auto Mode. Shooters can also select manual brightness settings with memory recall and lockout to prevent unintended changes. With a side-loading CR1632 battery rated up to 100,000 hours and Shake Awake™ technology, the optic is engineered for long-term readiness without frequent maintenance.

Designed around the industry-standard RMR footprint, the 507C X3 offers broad compatibility with optics-ready pistol slides and adapter plates. Its 1x magnification and unlimited eye relief allow for rapid, both-eyes-open shooting while maintaining a clear, parallax-free sight picture.

Key Features

• Multi-Reticle System: 2 MOA red dot, 32 MOA circle, or combined reticle

• RMR footprint compatibility for optics-ready pistols

• Solar Failsafe™ with automatic brightness adjustment

• Shake Awake™ with memory and lockout function

• Side-tray CR1632 battery for easy replacement

• Up to 100,000-hour battery life (manufacturer stated)

• 7075-T6 aluminum housing for increased durability

• IP67 waterproof rating

• 5000G vibration resistance

• 8 daylight and 4 night-vision brightness settings

Optical Specifications

• Reticle: 2 MOA dot & 32 MOA circle (Red, 650nm)

• Magnification: 1x

• Parallax-Free: Yes

• Eye Relief: Unlimited

• Lens Coating: Multi-layer reflective glass

Electronic Specifications

• Power Source: Solar & CR1632 battery

• Battery Life: Up to 100,000 hours

• Brightness Settings: 8 Daylight / 4 Night Vision

• Auto Mode: Yes (Solar Failsafe enabled)

Construction & Durability

The HS507C-X3-RD-MRS is machined from 7075-T6 aluminum with a reinforced housing structure for enhanced durability under recoil and impact. Rated IP67, it is resistant to water and dust intrusion. The optic is also tested to withstand up to 5000G vibration, supporting reliability on reciprocating pistol slides.

Compatibility & Intended Use

The 507C X3 uses the RMR footprint and is designed for full-size and compact optics-ready pistols. It is suitable as a primary pistol red dot for concealed carry (EDC), duty applications, defensive setups, and range training. Installation may require a compatible slide cut or mounting plate depending on the firearm platform.

In the Box

• Holosun HS507C-X3-RD-MRS Red Dot Sight

• CR1632 battery (installed)

• Mounting hardware

• Adjustment tool

• User manual

Manufactured by Holosun, the 507C X3 delivers a durable, feature-rich pistol red dot optic combining solar-assisted power, multi-reticle versatility, and extended battery life in a compact RMR-compatible design.