magazine capacity

A high-capacity magazine ban is a law which bans or otherwise restricts high-capacity magazines, detachable firearm magazines that can hold more than a certain number of rounds of ammunition. For example, in the United States, the now-expired Federal Assault Weapons Ban of 1994 included limits regarding magazines that could hold more than ten rounds. Eight U.S. states, and a number of local governments, ban or regulate magazines that they have legally defined as high-capacity. The majority of states (42) do not ban or regulate any magazines on the basis of capacity. States that do have large capacity magazine bans or restrictions typically do not apply to firearms with fixed magazines whose capacity would otherwise exceed the large capacity threshold.
The federal ban which was in effect from 1994 to 2004 defined a magazine capable of holding more than 10 rounds of ammunition as a large capacity ammunition feeding device. Likewise, the state of California defines a large capacity magazine as "any ammunition feeding device with a capacity to accept more than 10 rounds." Such devices are commonly called high-capacity magazines. Among states with bans, the maximum capacity is 10 to 20 rounds. Several municipalities, such as New York City, restrict magazine capacity to 5 rounds for rifles and shotguns. The state of New York previously limited magazine capacity to 7 rounds, but a District Court ruled this ban to be excessive and could not "survive intermediate scrutiny".Most pistols sold in the U.S. are made and sold with magazines holding between 10 and 17 rounds. In November 2013, the National Rifle Association sued the city of San Francisco over an ordinance banning possession of magazines capable of holding more than 10 rounds. In March 2014, the Supreme Court refused to halt a similar ban by the city of Sunnyvale, California. In March 2019 a California lower court declared magazine restrictions to be a violation of the Second Amendment.

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