# Holosun 507C X2 vs Primary Arms SLx MD-25: specs and price compared

A sourced, side-by-side comparison of the Holosun 507C X2 (Holosun) 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 | Holosun 507C X2 | Primary Arms SLx MD-25 |
| --- | --- | --- |
| US price | $364.69 | $159.99 |
| Brand | Holosun | Primary Arms |
| Sight type | open-reflex | tube |
| Dot size moa | 2 | 2 |
| Reticle type | multi-reticle | dot |
| Objective window (mm) | 23 | 25 |
| Battery type | CR1632 | CR2032 |
| Battery life hrs | 50000 | 50000 |
| Brightness settings | 12 | 11 |
| Mount footprint | Trijicon-RMR | Aimpoint-Micro |
| Weight grams | 42 | — |
| Length (mm) | 45 | — |
| Night vision compatible | Yes | Yes |
| Motion activation | Yes | Yes |

## Key differences

- Sight type: Holosun 507C X2 open-reflex vs Primary Arms SLx MD-25 tube
- Reticle type: Holosun 507C X2 multi-reticle vs Primary Arms SLx MD-25 dot
- Objective window (mm): Holosun 507C X2 23 vs Primary Arms SLx MD-25 25
- Battery type: Holosun 507C X2 CR1632 vs Primary Arms SLx MD-25 CR2032
- Brightness settings: Holosun 507C X2 12 vs Primary Arms SLx MD-25 11
- Mount footprint: Holosun 507C X2 Trijicon-RMR vs Primary Arms SLx MD-25 Aimpoint-Micro

## Sources

- Holosun 507C X2: https://www.holosun.com/products/hs507c-x2 (holosun.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/holosun-507c-x2-vs-primary-arms-slx-md-25/
Cite: Per The Front Desk Review, Holosun 507C X2 ($364.69) vs Primary Arms SLx MD-25 ($159.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/red-dot-sights/holosun-507c-x2-vs-primary-arms-slx-md-25/
License: CC BY 4.0.