# Holosun 507C X2 vs Sig Sauer Romeo-X Pro: specs and price compared

A sourced, side-by-side comparison of the Holosun 507C X2 (Holosun) and Sig Sauer Romeo-X Pro (Sig Sauer) among red dot sights. Holosun 507C X2 is the cheaper of the two at $364.69.

## Side by side

| Spec | Holosun 507C X2 | Sig Sauer Romeo-X Pro |
| --- | --- | --- |
| US price | $364.69 | $469.99 |
| Brand | Holosun | Sig Sauer |
| Released | — | 2023 |
| Sight type | open-reflex | open-reflex |
| Dot size moa | 2 | 2 |
| Reticle type | multi-reticle | circle-dot |
| Objective window (mm) | 23 | 24 |
| Battery type | CR1632 | CR1632 |
| Battery life hrs | 50000 | 20000 |
| Brightness settings | 12 | 15 |
| Mount footprint | Trijicon-RMR | Leupold-DeltaPoint-Pro |
| Weight grams | 42 | 42.5 |
| Length (mm) | 45 | 46.5 |
| Night vision compatible | Yes | Yes |
| Motion activation | Yes | Yes |

## Key differences

- Reticle type: Holosun 507C X2 multi-reticle vs Sig Sauer Romeo-X Pro circle-dot
- Objective window (mm): Holosun 507C X2 23 vs Sig Sauer Romeo-X Pro 24
- Battery life hrs: Holosun 507C X2 50000 vs Sig Sauer Romeo-X Pro 20000
- Brightness settings: Holosun 507C X2 12 vs Sig Sauer Romeo-X Pro 15
- Mount footprint: Holosun 507C X2 Trijicon-RMR vs Sig Sauer Romeo-X Pro Leupold-DeltaPoint-Pro
- Weight grams: Holosun 507C X2 42 vs Sig Sauer Romeo-X Pro 42.5
- Length (mm): Holosun 507C X2 45 vs Sig Sauer Romeo-X Pro 46.5

## Sources

- Holosun 507C X2: https://www.holosun.com/products/hs507c-x2 (holosun.com, verified 2026-07-11)
- Sig Sauer Romeo-X Pro: https://thetacticalden.com/sig-romeo-x-pro-review-a-rugged-and-reliable-pistol-red-dot/ (thetacticalden.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/red-dot-sights/holosun-507c-x2-vs-sig-sauer-romeo-x-pro/
Cite: Per The Front Desk Review, Holosun 507C X2 ($364.69) vs Sig Sauer Romeo-X Pro ($469.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/red-dot-sights/holosun-507c-x2-vs-sig-sauer-romeo-x-pro/
License: CC BY 4.0.