Assault weapons, semi-automatic rifles and the AR-15: Defining the debate - cleveland.com
What to know about machine gun laws in the US - ABC News
Semi-automatic rifle ban passes Washington state Legislature | AP News
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Automatic rifle | weapon | Britannica
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Shootings with semiautomatic rifles more deadly than handguns, study says | US gun control | The Guardian
Firearms - Guides - Importation & Verification of Firearms - National Firearms Act Definitions - Machinegun | Bureau of Alcohol, Tobacco, Firearms and Explosives
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Assault rifle and pistol offered as prizes in Texas girls' softball raffle
Semi-automatic rifles kill twice as many as other guns, study finds
Wal-Mart To End Sales Of Some Semi-Automatic Rifles, Citing Low Demand | NPR Article | WNYC
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How the Las Vegas Shooter Could Have Gotten an Automatic Rifle | WIRED