Vortex Optics
Vortex Venom
$369.99
Best Red Dot Sights · head-to-head
Vortex Venom 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 Vortex Venom 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 | Vortex Venom | Primary Arms SLx MD-25 |
|---|---|---|
| US price | $369.99 | $159.99 |
| Brand | Vortex Optics | Primary Arms |
| Released | — | — |
| Sight type | open-reflex | tube |
| Dot size moa | — | 2 |
| Reticle type | dot | dot |
| Objective window (mm) | — | 25 |
| Battery type | CR1632 | CR2032 |
| Battery life hrs | — | 50000 |
| Brightness settings | 10 | 11 |
| Mount footprint | Docter/Noblex | Aimpoint-Micro |
| Weight grams | — | — |
| Length (mm) | — | — |
| Night vision compatible | No | Yes |
| Motion activation | No | Yes |
Sources — Vortex Venom: vortexoptics.com (verified 2026-07-11). Primary Arms SLx MD-25: primaryarms.com (verified 2026-07-11).
What's the difference between the Vortex Venom 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: Vortex Venom open-reflex vs Primary Arms SLx MD-25 tube
- Battery type: Vortex Venom CR1632 vs Primary Arms SLx MD-25 CR2032
- Brightness settings: Vortex Venom 10 vs Primary Arms SLx MD-25 11
- Mount footprint: Vortex Venom Docter/Noblex vs Primary Arms SLx MD-25 Aimpoint-Micro
- Night vision compatible: Vortex Venom false vs Primary Arms SLx MD-25 true
- Motion activation: Vortex Venom false vs Primary Arms SLx MD-25 true