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Speargun Size Guide

by Travis Hogan

Find the Right Speargun for Your Diving Style

At Aimrite International, choosing the right speargun size comes down to three key things:

  • Visibility

  • Target Species

  • Dive Environment

A shorter gun offers better manoeuvrability in reefs and dirty water, while a longer gun delivers greater range and accuracy in clear water and bluewater hunting.

Quick Size Guide

Speargun Size Best For Typical Visibility Target Species
70–80cm Tight reef hunting, caves, dirty water 1–5m Bream, coral trout, small reef fish
90cm All-round reef gun 3–8m Coral trout, sweetlip, snapper
100cm Most versatile size 5–12m Spanish mackerel, trout, reef pelagics
110cm Clear water reef & light bluewater 8–15m Mackerel, cobia, tuna
120cm+ Bluewater hunting 12m+ Wahoo, dogtooth tuna, large pelagics

Choosing the Right Size

70–80cm Spearguns

Close Quarters & Dirty Water

Perfect for:

  • Reef holes and caves

  • Low visibility conditions

  • Shore diving

  • Fast tracking around structure

These shorter guns swing quickly and are easy to manoeuvre around coral bommies and tight terrain.

Best suited for:
Coral trout, reef fish, estuary species and beginner divers.

Recommended Aimrite Models

90–100cm Spearguns

The Ultimate All-Rounder

If you only own one speargun, this is the sweet spot.

A 90–100cm gun gives you:

  • Excellent versatility

  • Balanced power and manoeuvrability

  • Enough range for most reef and some pelagic species

This is the most popular size range for Australian conditions.

Best suited for:
Coral trout, mackerel, snapper, sweetlip, cobia and general reef hunting.

Recommended Aimrite Models

110–120cm+ Spearguns

Clear Water & Bluewater Hunting

Longer guns provide:

  • Greater shooting range

  • Increased shaft speed

  • Better accuracy in open water

Designed for divers targeting powerful pelagic species in clear conditions.

Best suited for:
Wahoo, tuna, Spanish mackerel, mahi mahi and dogtooth tuna.

Recommended Aimrite Models

Railgun vs Rollergun

Railguns

  • Simpler setup

  • Fast reloads

  • Lightweight and versatile

  • Perfect for reef and everyday diving

Rollerguns

  • More power for their size

  • Increased range and efficiency

  • Reduced recoil

  • Ideal for clear water and larger fish

For divers chasing maximum performance and range, roller systems excel in bluewater environments.

Beginner Recommendation

If you're new to spearfishing:

Start with a 90cm or 100cm Railgun

These sizes provide:

  • Easy handling

  • Good range

  • Versatility across most conditions

  • Faster learning curve

A 100cm is often considered the best “do-it-all” size for Australian spearfishing.

Pro Tip From Aimrite

Match your gun size to the visibility — not just the fish.

Even large fish can be landed with smaller guns in dirty water, while clear conditions often require additional range and accuracy.

Why Aimrite?

Since 1998, Aimrite International has built performance-driven spearguns trusted by divers worldwide.

  • Australian designed & assembled

  • Individually tested and hand assembled

  • Lifetime warranty

  • Proven on world-record fish

  • Built for real spearfishing conditions

Performance Where It Counts.

 

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