[Oldsarge]

So you're looking at a two-handed operation? I know about trigger releases though I never used anything but my fingers. Of course, I never used anything but a recurve bow, either. Shows how old I am! I'm not saying it wouldn't work, but have my doubts as to its practicality. With a bow and arrow, you are in a dynamic tension with the weapon. The speargun is much more like a crossbow, in that you set the tension up but the weapon itself is autonomous. You can put it down cocked and pick it back up again. Can't do that with a bow. Trying to use the trigger release in a speargun would require you to hold the gun with one hand and release it with the other, unless you've got an idea I can't visualize. That doesn't give you a hand to control the recoil with. Competition pistol shooters use one hand. Practical pistol shooters use both hands. Personally, I think spearguns are a lot more like practical pistol and should be shot with two hands controling the gun, not one hand controlling and one hand pulling the trigger.