Well I felt like sharing my experiences with JBL guns.
Pictured below are the old versions of the JBL spearguns. Notice how the trigger mechanism/handle is one solid metal piece (this is how you can tell it's the old version). I've noticed this trigger mechanism is not designed to handle a lot of band power. So with every band you load it increases the amount of force needed to pull the trigger. Depending on your gun it can get to the point where it's more than noticeable and can become a real problem when shooting fish. I've spooked fish or completely missed them while trying to pull the trigger. Now that's not to say this gun won't kill fish, it will. It just can be annoying when you have to spend an extra 2 seconds squeezing the trigger at whatever you're aiming at. For some fish that short moment can be the difference between success or failure.

Here (below) is a picture of JBL's new version with a much better Kitto trigger mechanism. Notice how the trigger mechanism/handle is separate instead of joined together (this is how you can tell it's the new version). I've used this new gun and can say the trigger performs perfectly. You don't have to strain you finger to pull the trigger. Just a smooth easy pull and it fires. Also there's no difference in the trigger pull if you have one band loaded or multiple bands loaded. It fires just as well as any professionally made speargun.

Below here is a list of all of their metal guns. I've tried the magnum series and they are the same as the old wooden version except made of metal. None of the metal versions have the Bill Kitto trigger mechanism. So none of these will perform as well as the new Wooden JBL spearguns.




Carbine series.... I've tried firing the smallest version of this gun and I was like WTF!? It took a huge amount of effort just to pull the trigger back. 10x worse than any gun I've ever tried. Think about squeezing something as hard as you possibly can and that's about the strength needed to fire this gun. By the time you mange to fire the gun you're completely off target. Seriously I can't believe JBL sells this gun. I can't imagine who would ever want to own a gun like this. I'd have a better chance of catching a fish with a pointy stick!

Lastly JBL sells an "Elite Series". These are the same guns as the ones above, except they are designed to shoot with an "open track" (meaning there is no hole in the front of the gun for the metal shaft to pass through). They also have shark fins instead of notches on the shaft. And the bands are tied together with spectra cord wishbones. If I could own any JBL gun this is the one I would want to have (the wooden version of course)
But just like the other metal guns I wouldn't recommend the Elite metal version as it has the same sub-par trigger mechanism I described in my first paragraph.
