Where do you get the This Machine in Fallout New Vegas?

Answer 1

Enter the McCarran Airfield, go through the terminal building, use the second floor exit to reach a domed room, head to the other side to the door. You're now in the quartermaster's room, by speaking to him (you may need barter or speech skills) you can get a mission to make a deal with the Gun Runners. He'll give you This Machine as a reward if you complete it, or if you turn him in to Lieutenant Boyd, you get it from her instead.