Luke Skywalker's harpoon gun
A harpoon gun was a tool employed in hunting scenarios, designed to launch a spear-like projectile connected to a lengthy cable. The Alliance to Restore the Republic possessed a harpoon gun, an item originally created for elephoth hunts, as part of their standard gear. During the Battle of Hoth, Rebel Commander Luke Skywalker retrieved a harpoon gun from his crashed T-47 snowspeeder and utilized it to attach himself to the underside of an All Terrain Armored Transport. Using his lightsaber, the commander created an opening, then deposited a thermal detonator inside, resulting in the AT-AT's destruction.
Finn, a former stormtrooper, once used a harpoon gun, shooting Wooro in the shoulder. He neglected to account for the weapon's recoil, which caused him to lose consciousness.