M3A1 "Grease Gun" SMG

The  is a small gun in Fallout 2.

Female raiders between Broken Hills and Vault City carry this weapon, although they no longer spawn once you eliminate the Raider threat. Big Jesus Mordino also gives the player one when they kill Louis Salvatore.

This SMG is decently fast, costing 1 AP less to fire than most other SMGs. However, it is limited by heavy ammunition, weighing 1 pound for every 10 shots. This makes the weapon rather cumbersome to carry, especially for low Strength Characters.

Behind the scenes
The Grease Gun is based on its real life counterpart, the M3 submachine gun, which entered service in the U.S. Army on December 12, 1942. Designed as a cost-effective substitute for the .45 caliber Thompson submachine gun, it was nicknamed the "Grease Gun" due to its similarity in appearance to the mechanics tool of the same name.

Pistolet maszynowy M3A1