Can I have a character make use of a handheld speargun in a postapocalyptic setting to shoot people and pull them back (or at least retain them) with the gun's cord?
I came across some criteria/problems that might influence how useful this weapon might be and hence how this question might be answered if someone has information on them:
A speargun can be powered using rubber bands or pneumatic propulsion but I haven't found any general information how strong either of those methods is. The weapon should have enough impact and range to go deep enough into/through human flesh to be able to pull the person back with the cord, being shot from some distance. I do know that there was an accident with a teenager being accidentally shot through the head with a speargun, but I don't know the distance of said shooter.
I also read that the recoil could be impossible to handle out of the water (which would make it completely useless), while in the first linked video this didn't seem to be much of a problem.
- The whole story is set in a postapocalyptic world so spare parts
and competent mechanics are rare... That being said it can be a
deal-breaker if those gadgets get broken easily or the gas cartridge or the rubber band only last for a short time of use.
The setting is the ruins of a present-day metropolis (not a wasteland) and there is some trade with recovered old-world-stuff going on so rich people could be able to get in possession of a well-preserved present-day weapon but finding spare parts for one particular model should prove very difficult. Also there is no industry going on to just produce weapons of the same effectiveness oneself.
- I also noticed that the cord of spearguns looks pretty thin, maybe too weak to pull a human back or at least restrain him/her if used out of the weight-reducing water. The crank for the cord also looks very tiny but one could simply pull back the rope by hand in a pinch. If the original cord should prove too weak it could be replaced by something stronger, but this could make the missile too heavy to be effective. And the pull-back-function is the one benefit that sets that weapon apart from others.