The Bushmaster M4 Types Carbine, a semiautomatic rifle, uses a 20 or 30-round magazine.
The suspect also bought an AR-15 semiautomatic rifle, a military-style gun popular with sportsmen.
Legislation to control the spread of deadly semiautomatic weapons will not, of course, eliminate such violence.
Such semiautomatic weapons also are not much use for hunting deer and the like.
And what is the reaction to the fact that investigators were allowed to legally buy semiautomatic pistols?
Unlike the military version, the AR-15 is a semiautomatic, firing one bullet per squeeze of the trigger.
However, he said, security has been beefed up on campus, including officers on foot patrols carrying semiautomatic weapons.
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In response, Congress threatened to pass a law that specified the legality of semiautomatic handguns in the District.
Excerpt: I inherited this no-brand semiautomatic from the very proper maiden aunt who raised me after my parents died.
Loughner bought the Glock semiautomatic pistol used in the shooting back in November.
Officials said that the 9 mm semiautomatic handgun with multiple ammunition magazines used by the attacker had been legally purchased.
Police recovered two handguns and 15 rifles at Grumberg's Saugerties residence including an AR-15 semiautomatic rifle after executing a search warrant.
The guns covered by the original were not the fully automatic machine guns used by the military, but semiautomatic versions of those guns.
But the benefits at the time were outweighed by increased use of non-semiautomatic weapons, which the study said were used more frequently in crime.
Opponents of tougher gun laws, led by the NRA, argue most gun violence involves pistols in urban areas, rather than the semiautomatic firearms targeted by Feinstein.
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Shortly afterward, the Senate blocked a proposal to ban the manufacture and sale of certain semiautomatic rifles often called assault weapons and ban high-capacity ammunition magazines.
Colorado and New York also passed new gun-control requirements in the wake of the Newtown shooting, in which a 20-year-old gunman used a military-style semiautomatic rifle.
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Agents found a 40-caliber semiautomatic pistol in his fanny pack.
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Mr. Holmes was arrested outside the midnight showing of "The Dark Knight Rises, " police said, still clad in body armor and armed with several weapons, including a semiautomatic rifle.
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He says that means it applies to semiautomatic handguns as well, adding that there may be more semiautomatic handguns in use right now in the U.S. than there are revolvers.
Heller created a panic among gun-control advocates because it condoned the ownership of semiautomatic handguns, which are among the most common firearms in use but also the target of many restriction efforts.
He has maintained the 9-mm semiautomatic handgun in his hand went off accidentally when he bumped into Mr. Figoski as the 47-year-old officer rushed down the narrow steps that lead to the apartment.
Prosecutors contend that Combs fired a semiautomatic pistol toward the ceiling inside the club, threw it into the street, and then ordered his driver to take him from the scene to elude police.
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In July 2004, on a dark Moscow street, Paul Klebnikov--the American editor of FORBES RUSSIA and one of the leading investigative reporters in business journalism--was shot nine times with a semiautomatic Russian Makarov pistol.
Bernard Zapor -- the Bureau of Alcohol, Tobacco, Firearms and Explosives special agent in the investigation -- said Monday that the 9mm semiautomatic handgun with multiple ammunition magazines used by the attacker had been legally purchased.
Obama's proposals include a ban on popular semiautomatic rifles that mimic assault weapons, a limit of 10 rounds per magazine, and universal background checks for anyone buying a gun, whether at a store or in a private sale.
Most hunters also grew up in a culture of strict regulation, where any passing game warden can ask to see your license and inspect your semiautomatic shotgun to make sure it has a plug limiting it to three shells.
The state's new gun laws classify more semiautomatic rifles as so-called assault weapons, make it illegal to own ammunition magazines with more than seven rounds and require many gun owners to renew their licenses every five years, among other measures.
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Passed in January, the gun laws classify more semiautomatic rifles as so-called assault weapons, make it illegal to own ammunition magazines with more than seven rounds and require many gun owners to renew their licenses every five years, among other measures.
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