Fast travel to Oberland Station (under the bend of the river), which is a good distance southeast of Sanctuary. Once you are in Oberland, head directly east until you see a downed UFO on fire. There will be some green alien blood near the crashed UFO. Follow the trail of green blood up the small hill and down off the cliff and into the nearby cave. Enter the cave and kill the alien. Then, collect the Alien Blaster Pistol and the ammo for it on the body of the alien. The alien will have between 400 and 550 rounds of ammo for the weapon. Its stats are 70 damage, 100 fire rate, 149 range, 73 accuracy, 2.5 weight, and 1551 value. You can take the weapon to a workbench and modify the Barrel, Grip, Mag, and Sights. Since there is no other known way to obtain ammo for this weapon, you can change the Mag on it so it uses Fusion Cells. Note: The weapon damage will decrease by two points when changing the Mag to Fusion Cells.
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