A Brief History of Guns in the U.S. | Hopkins Bloomberg Public Health Magazine
The Puckle Gun or Defense Gun
Firearms History and the Technology of Gun Violence – UC Davis Library
Eighteen-Year-Olds with AR-15s | The New Yorker
Automatic rifle | weapon | Britannica
Experimental semi-automatic rifles, 1919-1931- excluding Garand's and Pedersen's rifles - Springfield Armory National Historic Site (U.S. National Park Service)
A Brief History of the Assault Rifle | RAND
History Of The First Semi-Automatic Pistols | An NRA Shooting Sports Journal
The Semi-automatic Rifle - history of military firearms
Gun Timeline | History Detectives | PBS
Assault rifle | Definition, Examples, Facts, & History | Britannica
A Brief History of the Assault Rifle - The Atlantic
How the Las Vegas Shooter Could Have Gotten an Automatic Rifle | WIRED
Machine gun - Wikipedia
History of gun-control legislation - The Washington Post
Firearms - HISTORY
Gun laws and selling guns to 18-year-olds is being debated by states and courts : NPR
What's the difference between a semi-automatic weapon and a machine gun? | HowStuffWorks
Experimental semi-automatic rifles, 1919-1931- excluding Garand's and Pedersen's rifles - Springfield Armory National Historic Site (U.S. National Park Service)
How AR-15 became the most popular rifle in America | CNN
Amazon.com: The Best Personal Automatic Weapons in the World War II: History of the Firearms eBook : Brown, Francis W.: Kindle Store
Machine pistol - Wikipedia
