The Thompson Submachine Gun, the Gun That Made the Twenties - Firearms News
Hiram Maxim posing with his invention, The Maxim Gun, the world's first fully automatic machine gun (undated, c.1900) "760 shots per minute" [1352 x 850] : r/HistoryPorn
Machine gun - Wikipedia
Maxim gun - Wikipedia
The Puckle Gun or Defense Gun
The Decades-Old Gun Ban That's Still On The Books : It's All Politics : NPR
Definition of what's an 'assault weapon' is a very contentious issue
Machine pistol - Wikipedia
Shoot Full-auto Machine Guns at the Machine Guns Vegas Gun Range
The SVT-40 - The Soviet's First Semi-Automatic Rifle
4 basic questions about the AR-15 - The Washington Post
Evolution of Semi-Automatic Weapons
What, Exactly, Is An AR-15 Rifle?
Fedorov Avtomat, The First Assault Rifle? - YouTube