This one's pretty simple. It's a throwable harpoon with a wrist-strapped tether. Aim and click to throw it like a grenade, flying decently far in a generous ark, dealing moderate laceration and bleed damage. Hold down both the aim and fire buttons to reel it, or deselect the weapon to detach it.
Can be fabricated with no recipe, requires weapons skill to throw further and harder, and can be purchased at any outpost.
The idea is to have a more accessible version of the harpoon gun. Less cost to create and use, but also less efficacy. A good weapon for early campaign, or for arming assistants when they're too incompetent to use firearms.