This Machine

 is a weapon in Fallout: New Vegas.

Characteristics
is chambered in .308 and holds eight rounds at a time, and is a unique Semi-Automatic Rifle. It is in excellent condition when found. The gun is thought to be a M1 Garand from World War 2, complete with loud, tinny cartridge ejection.

Locations
is given to you by someone for not turning him in at the end of Free Quest: Dealing with Contreras, Camp McCarran. However, It seems it can also be acquired by hacking his computer and turning him in as well, as they "confiscate" from him. On the 360, one can also obtain the weapon in the following way: on the mission to meet Price, talk to Keller, and use the passphrase. When he replies, choose the option to say that is not the correct password. Attack him afterwards (dialog option), and then return to Contreras. The dialog will be bugged and you can choose the option that say you've convinced the ranger to work with him (in death), and he'll give you the gun.

Alternatively, this weapon can be obtained by selecting the option to turn Contreras in after having delivered his medical supplies. Be warned though, as he will attack you if you choose this option. After having killed him, go to the Terminal Building, and tell Lt. Boyd that you have proof Contreras was involved in illegal activities. She will give you the weapon, claiming she had taken it from Contreras, simply because he was annoying.

Appearances
appears in Fallout: New Vegas.

Behind The Scenes
is a refrence to the slogan "This Machine Kills Fascists", which American musician Woody Guthrie had written on his guitar. On the rifle, the slogan is changed to "Well This Machine Kills Commies", written on the left side of the weapon.