Holosun
Holosun 507C X3
Third-gen multi-reticle pistol dot with photodiode sensor, Solar Failsafe, and RMR footprint
Quick Specs
- Price
- $300
- Weight
- 1.5 oz
- Brand
- Holosun
- Category
- pistol-optic
Features
- •2 MOA dot + 32 MOA circle
- •Forward light sensor
- •Solar Failsafe
- •RMR footprint
Capability Boosts
Recommended For
+14 more
Where to Buy
Compare current prices and availability from retailers we work with.
Holosun HS507C-X3-RD 1x 0.91x0.67 in Reflex Red Dot Sight, Red 2 MOA Dot, 32 MOA Circle, Black, HS507C-X3-RD
Price History
90-day low $299.99Compatibility Tags
Overview
The Holosun 507C X3 is the third generation of Holosun's most popular full-size pistol optic, announced at SHOT Show 2026. The headline hardware change is a forward-facing light sensor, but Holosun's current functions table does not list full automatic brightness for this model, so it should be treated as a Solar Failsafe / brightness-assist component rather than a complete auto-brightness solution.
The 0.91 x 0.67-inch window retains the same general full-size 507C sight picture, and the Multi-Reticle System carries over with the same 2 MOA dot, 32 MOA circle, or combined reticle. The RMR footprint keeps compatibility with the broadest pistol-slide ecosystem.
The X3 is available in red, green, and gold reticle colors from launch. The side-loading CR1632 battery delivers up to 50,000 hours of runtime at setting 6, backed by Solar Failsafe for daylight backup power.
Key Features
- Photodiode sensor supports Solar Failsafe behavior
- Multi-reticle system: 2 MOA dot, 32 MOA circle, or both
- Available in red, green, and gold reticle colors
- Solar Failsafe backup power
- Shake Awake motion-activated power management
- Side-loading CR1632 battery
- RMR footprint for universal slide compatibility
- Improved lens geometry with reduced tint
Pros
- +Updated X3 housing and lens package over the X2 generation
- +Three reticle color options (red, green, gold) from launch
- +Forward light sensor and Solar Failsafe support daylight power assistance
- +Same proven RMR footprint as 507C X2
- +Solar Failsafe provides dead-battery insurance
- +Side-loading battery without unmounting optic
Cons
- −Modest price increase over outgoing 507C X2
- −Open emitter design still vulnerable to debris
- −New product with limited real-world durability data
- −Photodiode feature should not be treated as full auto-brightness in the current spec table
Detailed Specifications
- Reticle
- 2 MOA dot / 32 MOA circle / Both
- Magnification
- 1x
- Battery Type
- CR1632 (side-loading)
- Battery Life
- 50,000 hours at setting 6
- Waterproof Rating
- IP67
- weight
- 1.55 oz
- Length
- 1.78 inches
- windowSize
- 0.91 x 0.67 inches
- dimensions
- 1.78 x 1.31 x 1.1 inches
- Adjustment Type
- 1 MOA per click
- Adjustment Range
- ±50 MOA windage/elevation
- Mount Type
- RMR footprint
Compatible Platforms
+208 morePairs Well With
Top matchesSIG Sauer
SIG P320 Full Size
2 shared compatibility tags
SIG Sauer
SIG P320 Compact
2 shared compatibility tags
SIG Sauer
SIG P320 X-Carry
2 shared compatibility tags
Glock
Glock 17 Gen5 MOS
2 shared compatibility tags
Glock
Glock 19 Gen5 MOS
2 shared compatibility tags
Glock
Glock 45 Gen5 MOS
2 shared compatibility tags
Similar Products
Related Guides & Articles
Guides
Build Your Custom Configuration
Add the Holosun 507C X3 to your build and see how it enhances your platform.