Harpoon gun (Earth-7149)

The harpoon gun is a small handgun used by exploratory and commercial teams aboard civilian freighters. One such weapon was notably used by Ellen Ripley to kill the Alien aboard the Narcissus.

History
In 2552, once Ellen Ripley boarded the Narcissus, she discovered the shuttle had been infiltrated by the Alien. She then took the shuttle's IRC Mk.50 compression suit and armed herself with a harpoon gun, shooting the Alien to space and killing the creature with the gun.