Holosun
Holosun 507C X2
$364.69
Best Red Dot Sights · head-to-head
Holosun 507C X2 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 Holosun 507C X2 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 | Holosun 507C X2 | Primary Arms SLx MD-25 |
|---|---|---|
| US price | $364.69 | $159.99 |
| Brand | Holosun | Primary Arms |
| Released | — | — |
| 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 |
Sources — Holosun 507C X2: holosun.com (verified 2026-07-11). Primary Arms SLx MD-25: primaryarms.com (verified 2026-07-11).
What's the difference between the Holosun 507C X2 and Primary Arms SLx MD-25?
Where the two actually differ on the specs we track (6 of 12). Matching specs are omitted.
- 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