Vortex Viper PST Gen II 5-25x50 FFP vs Vortex Venom 5-25x56 FFP
Vortex Viper PST Gen II 5-25x50 FFP is a 5-25×50 FFP on a 30 mm tube with MRAD turrets; Vortex Venom 5-25x56 FFP is a 5-25×56 FFP on a 34 mm tube with MRAD turrets. The Vortex Viper PST Gen II 5-25x50 FFP is lighter by 3.8 oz. The Vortex Venom 5-25x56 FFP has more elevation travel, 85.9 MOA to 68.8 MOA in the same unit. At its top magnification the Vortex Venom 5-25x56 FFP keeps a 2.2 mm exit pupil against 2 mm for the Vortex Viper PST Gen II 5-25x50 FFP — estimated from the layout, not measured. On our last catalog check the Vortex Venom 5-25x56 FFP listed for about $800 less.
| Spec | VortexVortex Viper PST Gen II 5-25x50 FFP | VortexVortex Venom 5-25x56 FFP |
|---|---|---|
| Approx. price | ~$1,500 | ~$700 |
| Magnification | 5-25× | 5-25× |
| Objective lens | 50 mm | 56 mm |
| Focal plane | FFP | FFP |
| Reticle | EBR-7C MRAD | EBR-7C MRAD |
| Illuminated | Yes | No |
| Turret unit | MRAD | MRAD |
| Per click | 0.1 MRAD (0.36″ at 100 yd) | 0.1 MRAD (0.36″ at 100 yd) |
| Elevation travel | 20 MRAD (≈68.8 MOA) | 25 MRAD (≈85.9 MOA) |
| Windage travel | 10 MRAD | 25 MRAD |
| Zero stop | Yes | Yes |
| Turrets | Exposed | Exposed |
| Parallax | Side focus from 25 yd | Side focus from 15 yd |
| Eye relief | 3.4″ | 3.7″ |
| Field of view | 24.1–4.8 ft at 100 yd | 21.2–4.7 ft at 100 yd |
| Tube | 30 mm | 34 mm |
| Length | 15.8″ | 15.3″ |
| Weight | 31.2 oz | 35 oz |
| Warranty | VIP unlimited unconditional lifetime | VIP unlimited unconditional lifetime |
| Exit pupilest. | 10–2 mm (5×–25×) | 11.2–2.2 mm (5×–25×) |
| Twilight factorest. | 35.4 at 25× | 37.4 at 25× |
| Zoom ratioest. | 5× | 5× |
| Where to buy | Vortex → | Vortex → |
Tinted rows are where these two differ. Rows marked est. are computed, not published.
Exit pupil and twilight factor are computed from the published magnification and objective diameter, not measured. Real exit pupil is also capped by the erector at low magnification, and coatings and glass quality move low-light performance in ways the formula cannot see — read these as comparisons between layouts, not verdicts on scopes.