hand spear triggers

[lordoftweedhead]

hi guys, i wanted to make a hand spear trigger or at least find out how they work (by grip or whatever?) like the sea hornet one here http://www.seahornet.com/image/Grip-&-Trigger-Handspeargun.jpg
i found something i little more detailed
All About Hawaiian Slings
not entirely sure whether i have craft the sharft and put little grip notchs in it or not?
and has anyone see these manufactured pistol-gripped, trigger activated spears?
thanx guys

 

[cmburch]

I never had, but here are some more examples for ideas.

Pole Spears & Hawaiian Slings - ScubasWorld

 

[lordoftweedhead]

i dont think those are triggers rather a sliding handle that allows one to pull back the spear like a bow and arrow
thanxs though