HOLOSUN 407C/507C-X3 Solar Red Dot Sight
- Mounting Type: 407C / 507C / RMR
- Reticle Type: Dot, Circle
- Night vision: No
- Material Type: Aluminum
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A reasonable pick for RMR-footprint pistols, worth choosing the 507C variant specifically if the circle-dot reticle option matters to you.
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ASIN: B0GLK7DVNMModel: HS407C-X3-RDCategory: Handgun Scopes
Overview
A pistol reflex sight in the 407C/507C-X3 platform, sold across six dot, circle-dot, and color combinations, built around an RMR-footprint mount and a solar-assisted battery system. It targets shooters mounting an optic directly on a pistol slide.
This listing covers a red dot family, not a magnified scope, despite sitting in a handgun scopes category, and the RMR footprint is the detail that actually determines whether it will bolt onto a given slide cut. Holosun's X3 housing keeps the 407C and 507C variants dimensionally similar, with the main difference being that 507C models add a circle-dot multi-reticle option while 407C sticks to a single 2 MOA dot. Solar assist and Shake Awake are meant to extend battery life between charges rather than eliminate the need for a battery.
- RMR-footprint mount for pistol slides
- 12 manual brightness settings with lockout
- IP67 waterproof, 5000G shock rated
- Solar failsafe plus Shake Awake activation
Who it's for
Suited to pistol shooters who already have an RMR-cut slide or plan to mill one and want a low-profile carry or range optic. Less useful to anyone shopping for a rifle scope or needing magnification, since this is an unmagnified reflex sight.
Pros and cons
- RMR footprint fits many milled pistol slides
- Solar assist and Shake Awake extend runtime
- Six dot, circle-dot, and color variants to choose from
- Only fits slides already cut to the RMR footprint
- No magnification, not a rifle scope substitute
Performance notes
Brightness is set automatically by a forward-facing solar photodiode with 12 manual settings and a lockout mode available, and Shake Awake wakes the sight from standby on movement so it is live before the gun is presented. The housing is 7075-T6 aluminum rated to IP67 and 5000G, aimed at surviving recoil and field conditions on a carry pistol rather than a bench-mounted rifle.
Specifications
| Brand | HOLOSUN |
|---|---|
| Model | HS407C-X3-RD |
| Dimensions & fit | |
| Item Weight | 0.03 pounds |
| Item Dimensions L x W x H | 1.8 × 1.3 × 1.1 inches |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Red |
| Lens Color | Red |
| Compatibility & installation | |
| Mounting Type | 407C / 507C / RMR |
| Compatible Devices | Handgun |
| Included components | |
| Unit Count | 1 |
| Included Components | Lens Cloth, Manual, Tool |
| Warranty & support | |
| Warranty Description | Lifetime |
| Other details | |
| Reticle Type | Dot, Circle |
| Night vision | No |
| Sport Type | Hunting |
| Thread Type | M1913 |
| Product Style | 2 MOA |
Closest rivals on specs
Trijicon RMR Type 2 Adjustable Red Dot 6.5 MOA- Item Weight 0.03 vs 0.06 pounds (-50%)
Noblex NV OS 1x23 Reflex Sight for Glock MOS- Item Weight 0.03 vs 0.06 pounds (-50%)
Vector Optics Frenzy Pistol Red Dot Sight- Item Weight 0.03 vs 0.07 pounds (-57%)
Frequently asked questions
What is the difference between the Holosun 407C and 507C in this X3 line?
Per the listing, the two share the same specs, with the 507C adding a multi-reticle option that combines the 2 MOA dot with a 32 MOA circle, while the 407C offers the single dot only.
Will the Holosun 407C/507C-X3 fit any pistol?
It uses the RMR footprint, so it fits slides already milled to that cut; it will not mount on a slide without a compatible cut or plate.
Does the Holosun 407C/507C-X3 need a battery even with solar assist?
Yes, the solar photodiode is a failsafe that extends runtime, not a replacement for the battery that powers the reticle.