M4A1 Rifle from Alien

This is the iconic gun used by Ripley in the original Alien film. The M41A Pulse Rifle is a pulse-action, air-cooled, selective fire assault rifle chambered for 10×24mm Caseless ammunition manufactured by Armat Battlefield Systems. It was mainly employed by the United States Colonial Marine Corps and the United States Army as their primary infantry weapon during the late 20nd century. Through its use with the USCM, it saw regular use in various engagements with the Xenomorph and Yautja species.