M3A1 "Grease Gun" SMG

The  is a small gun in Fallout 2.

Female raiders between Broken Hills and Vault City have this weapon, although they will no longer spawn once you eliminate the Raider's threat. Big Jesus Mordino also gives the player this once 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, thus making this weapon rather cumbersome to carry, especially for low Strength Characters.

Behind the scenes
The Grease Gun is based on it's 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 calibre Thompson submachine gun. Nicknamed the "Grease Gun" because of it's similar appearance of the mechanics tool of the same name.

Pistolet maszynowy M3A1