Posted by Bob3 on September 10, 2001 at 02:05:11:
In Reply to: explosive harpoon posted by Félix Rubio Fernández on September 10, 2001 at 01:24:50:
What you're looking for is called a "powerhead", a device that replaces the spear point.
They cost around $100 and use common caliber rifle and pistol ammunition.