# Sig Sauer Romeo-X Pro vs Primary Arms SLx MD-25: specs and price compared

A sourced, side-by-side comparison of the Sig Sauer Romeo-X Pro (Sig Sauer) and Primary Arms SLx MD-25 (Primary Arms) among red dot sights. Primary Arms SLx MD-25 is the cheaper of the two at $159.99.

## Side by side

| 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 |

## Key differences

- 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

## Sources

- 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)
- Primary Arms SLx MD-25: https://www.primaryarms.com/primary-arms-slx-md25-rotary-knob-25mm-microdot-gen-2-autolive-2-moa-red-dot-reticle (primaryarms.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/red-dot-sights/sig-sauer-romeo-x-pro-vs-primary-arms-slx-md-25/
Cite: Per The Front Desk Review, Sig Sauer Romeo-X Pro ($469.99) vs Primary Arms SLx MD-25 ($159.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/red-dot-sights/sig-sauer-romeo-x-pro-vs-primary-arms-slx-md-25/
License: CC BY 4.0.