Rob Allen Cobia Speargun
Rob Allen Cobia Speargun
The Dive360 Take
The Cobia is worth a look when you want Rob Allen railgun hardware in a straightforward coastal setup. The Vecta 2 handle and mechanism are paired with a guided barrel, a 6.6mm shaft and a single 16mm rubber.
The 70cm option is handy in closer reef country, while 100cm and 110cm suit more open coastal conditions. Choose around your usual visibility and the space you have to manoeuvre.
This model uses a lighter-wall barrel, so we would keep it as a conventional band gun rather than convert it to a roller.
Size Guide
New Zealand Speargun Sizing Guide
Swipe to see all measurements
| Speargun length | Best suited to | Typical NZ use |
|---|---|---|
| Under 75 cm | Tight spaces & close-range hunting | Cray holes, caves, shallow reef and dirty water. Compact and easy to manoeuvre when visibility is limited. |
| 75 cm – 1 m | Reef & weed-line hunting | Great for butterfish, blue moki and close-range snapper. A versatile choice for typical coastal diving and moderate visibility. |
| 1 m – 120 cm | General NZ spearfishing | An excellent all-round range for snapper, kingfish, trevally and reef species. Good balance of range, accuracy and manoeuvrability. |
| 120 cm+ | Clear water & larger fish | Best when you need extra range and power—for kingfish, deeper pins and open-water hunting where visibility allows longer shots. |
NZ tip: Bigger isn't automatically better. Match your gun to the visibility and terrain you dive most often. A shorter gun can be much easier to use around reefs and weed lines, while longer guns come into their own in clear, open water.