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How Heat Treatment Transforms 17-4PH Into a High-Performance Speargun Shaft
The Steel Behind the Shot: Why 17-4PH Starts in the Lab 17-4PH stainless steel (Type 630, UNS S17400) is a martensitic precipitation-hardening alloy built...
Oct 10 2026
Carbon Fiber vs. Aluminum Pole Spears: The Full Breakdown
Carbon Fiber vs. Aluminum: What the Physics Actually Say Carbon fiber's tensile strength exceeds 3,500 MPa, and its elastic modulus sits above 230 GPa....
Oct 10 2026
5 Signs Your Speargun Shaft Needs Replacing (Before It Fails on You)
Why Your Shaft Is the Most Critical Component You're Probably Neglecting You've replaced your wetsuit. You've swapped out your bands. But when was the...
Oct 10 2026
Pole Spear Length Guide: Match Your Spear to Fish & Visibility
Why Most Divers Get Pole Spear Length Wrong Here is the most common beginner mistake: hauling a 9-foot pole spear into water with 5...
Oct 10 2026
