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Rob Allen
Rob Allen Tuna Railgun 1m
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Best Spearguns · head-to-head
Rob Allen Tuna Railgun 1m vs Mares Viper Pro DS 75cm
A sourced, side-by-side comparison. Mares Viper Pro DS 75cm is cheaper at $299.95. Every spec and price links to its source.
Mares
Mares Viper Pro DS 75cm
$299.95
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Rob Allen Tuna Railgun 1m | Mares Viper Pro DS 75cm |
|---|---|---|
| US price | — | $299.95 |
| Brand | Rob Allen | Mares |
| Released | — | — |
| Barrel length | 100 cm (39.4 in) | 75 cm (29.5 in) |
| Power type | band | band |
| Bands | 2x 16mm | 2x 16mm S-Power speed circular slings with Dyneema wishbone |
| Shaft diameter (mm) | 7.5 | 6.5 |
| Barrel material | aluminum (aircraft-grade, hard anodized) | aluminum (rigid anodized, with shaft/line guide) |
| Effective range (ft) | — | — |
| Reel ready | Yes | — |
| Buoyancy | — | — |
Sources — Rob Allen Tuna Railgun 1m: roballen.co.za (verified 2026-08-11). Mares Viper Pro DS 75cm: americandivingsupply.com (verified 2026-08-11).
What's the difference between the Rob Allen Tuna Railgun 1m and Mares Viper Pro DS 75cm?
Where the two actually differ on the specs we track (4 of 8). Matching specs are omitted.
- Barrel length: Rob Allen Tuna Railgun 1m 100 cm (39.4 in) vs Mares Viper Pro DS 75cm 75 cm (29.5 in)
- Bands: Rob Allen Tuna Railgun 1m 2x 16mm vs Mares Viper Pro DS 75cm 2x 16mm S-Power speed circular slings with Dyneema wishbone
- Shaft diameter (mm): Rob Allen Tuna Railgun 1m 7.5 vs Mares Viper Pro DS 75cm 6.5
- Barrel material: Rob Allen Tuna Railgun 1m aluminum (aircraft-grade, hard anodized) vs Mares Viper Pro DS 75cm aluminum (rigid anodized, with shaft/line guide)