Choosing the Right Speargun Length for Your Dive Style

Selecting the right speargun length is not about chasing the biggest number — it’s about balance. The correct length depends on visibility, habitat complexity, target species, and the diver’s own handling capacity. For experienced spearfishers, choosing the right setup can be the difference between consistency and compromise.

The Role of Band Stretch and Hydrodynamics

A longer barrel allows more band stretch, which translates into greater potential energy and velocity. However, that same length also introduces increased drag, reduced maneuverability, and longer shaft travel times — all of which can negatively impact shot accuracy if not properly matched with shaft diameter, band power, and the speargun’s structural stiffness.

Visibility Dictates Reach

In turbid or low-visibility conditions, longer guns become a liability. When visibility drops below 5 meters, a compact 70–90 cm speargun often performs better because it allows quicker tracking, faster shots, and fewer entanglement risks. Conversely, in clear blue water, longer guns (120+ cm) offer the range necessary to hit pelagic species before they drift out of reach.

Habitat Shapes Handling

Spearfishing in reef systems, caves, or rocky environments demands maneuverability. In tight underwater spaces, even 10 cm of extra barrel can make a difference. Shorter guns are easier to pivot, track, and reload. Open-water hunters, on the other hand, can benefit from the added reach and power that longer setups provide — especially if using assist systems to mitigate loading strain.

Target Species and Shot Distance

Large fish usually require longer shots and deeper penetration. This is where longer barrels paired with powerful bands shine. For smaller or medium-sized reef species, a balanced-length gun (100–110 cm) offers the best compromise between range, control, and comfort. Always consider the actual average shot distance you’re taking — not just theoretical reach.

Why One Size Doesn’t Fit All

Serious divers often build a quiver of guns for different conditions. One for reef. One for caves. One for pelagics. Some even modify the same gun with different shafts and band setups. The key is not having the “best” speargun — it’s having the right one for the dive you’re doing.

How SPIKE Optimizes the Equation

At SPIKE, we design each speargun length around real-world use. We don’t just scale the barrel — we recalibrate band stretch, shaft stiffness, buoyancy, and recoil control for every size. Combined with our PowerMod and Load Assist systems, even longer guns remain manageable and precise, while our ergonomic handle reduces strain during loading and shooting.