# Rob Allen Tuna Railgun 1m vs Salvimar Predathor Pneumatic 55cm: specs and price compared

A sourced, side-by-side comparison of the Rob Allen Tuna Railgun 1m (Rob Allen) and Salvimar Predathor Pneumatic 55cm (Salvimar) among spearguns.

## Side by side

| Spec | Rob Allen Tuna Railgun 1m | Salvimar Predathor Pneumatic 55cm |
| --- | --- | --- |
| US price | not published | $254.95 |
| Brand | Rob Allen | Salvimar |
| Barrel length | 100 cm (39.4 in) | 55 cm (21.7 in) |
| Power type | band | pneumatic |
| Bands | 2x 16mm | — |
| Shaft diameter (mm) | 7.5 | 8 |
| Barrel material | aluminum (aircraft-grade, hard anodized) | aluminum (round alloy) |
| Effective range (ft) | — | — |
| Reel ready | Yes | — |
| Buoyancy | — | — |

## Key differences

- Barrel length: Rob Allen Tuna Railgun 1m 100 cm (39.4 in) vs Salvimar Predathor Pneumatic 55cm 55 cm (21.7 in)
- Power type: Rob Allen Tuna Railgun 1m band vs Salvimar Predathor Pneumatic 55cm pneumatic
- Shaft diameter (mm): Rob Allen Tuna Railgun 1m 7.5 vs Salvimar Predathor Pneumatic 55cm 8
- Barrel material: Rob Allen Tuna Railgun 1m aluminum (aircraft-grade, hard anodized) vs Salvimar Predathor Pneumatic 55cm aluminum (round alloy)

## Sources

- Rob Allen Tuna Railgun 1m: https://www.roballen.co.za/?product=rob-allen-tuna (roballen.co.za, verified 2026-08-11)
- Salvimar Predathor Pneumatic 55cm: https://www.scuba.com/p-slvppg/salvimar-predathor-pneumatic-speargun (scuba.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/spearguns/rob-allen-tuna-railgun-100-vs-salvimar-predathor-55/
Cite: Per The Front Desk Review, Rob Allen Tuna Railgun 1m (not published) vs Salvimar Predathor Pneumatic 55cm ($254.95) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/spearguns/rob-allen-tuna-railgun-100-vs-salvimar-predathor-55/
License: CC BY 4.0.