[Swedish Jim]

Powerhead for dummies. 9mm jammed and waxed into a small gauge hosepipe (10mm) about 9cm long. Pop it over the spear tip when needed. Theoretically the spear become the firing pin. I carried then for few for years in the 80s and 90s, even put it on a couple of times (KZN) never had to use it. I no longer bother today. It wont work on a klippie and it buggers your spear should you fire it.