Sig Sauer
Sig Sauer Romeo-X Pro
$469.99
Released 2023
Best Red Dot Sights · head-to-head
Sig Sauer Romeo-X Pro vs Primary Arms SLx MD-25
A sourced, side-by-side comparison. Primary Arms SLx MD-25 is cheaper at $159.99. Every spec and price links to its source.
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Primary Arms
Primary Arms SLx MD-25
$159.99Cheaper
Which is better: the Sig Sauer Romeo-X Pro or Primary Arms SLx MD-25?
On the specs we track, they're closely matched. The Primary Arms SLx MD-25 is the cheaper at $159.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Sig Sauer Romeo-X Pro | Primary Arms SLx MD-25 |
|---|---|---|
| US price | $469.99 | $159.99 |
| Brand | Sig Sauer | Primary Arms |
| Released | 2023 | — |
| Sight type | open-reflex | tube |
| Dot size moa | 2 | 2 |
| Reticle type | circle-dot | dot |
| Objective window (mm) | 24 | 25 |
| Battery type | CR1632 | CR2032 |
| Battery life hrs | 20000 | 50000 |
| Brightness settings | 15 | 11 |
| Mount footprint | Leupold-DeltaPoint-Pro | Aimpoint-Micro |
| Weight grams | 42.5 | — |
| Length (mm) | 46.5 | — |
| Night vision compatible | Yes | Yes |
| Motion activation | Yes | Yes |
Sources — Sig Sauer Romeo-X Pro: thetacticalden.com (verified 2026-07-11). Primary Arms SLx MD-25: primaryarms.com (verified 2026-07-11).
What's the difference between the Sig Sauer Romeo-X Pro and Primary Arms SLx MD-25?
Where the two actually differ on the specs we track (7 of 12). Matching specs are omitted.
- Sight type: Sig Sauer Romeo-X Pro open-reflex vs Primary Arms SLx MD-25 tube
- Reticle type: Sig Sauer Romeo-X Pro circle-dot vs Primary Arms SLx MD-25 dot
- Objective window (mm): Sig Sauer Romeo-X Pro 24 vs Primary Arms SLx MD-25 25
- Battery type: Sig Sauer Romeo-X Pro CR1632 vs Primary Arms SLx MD-25 CR2032
- Battery life hrs: Sig Sauer Romeo-X Pro 20000 vs Primary Arms SLx MD-25 50000
- Brightness settings: Sig Sauer Romeo-X Pro 15 vs Primary Arms SLx MD-25 11
- Mount footprint: Sig Sauer Romeo-X Pro Leupold-DeltaPoint-Pro vs Primary Arms SLx MD-25 Aimpoint-Micro