What gun-control measures did Barack Obama propose after the Sandy Hook Elementary School shooting?

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Semiautomatic pistol — gun control Glock .40-calibre semiautomatic pistol.

Following the Sandy Hook Elementary School shooting in 2012, President Barack Obama proposed a series of gun-control measures aimed at reducing gun violence. His proposals included:

Mandating universal background checks for all gun purchases.
Banning the sale of assault weapons.
Prohibiting the sale of magazines containing more than 10 rounds of ammunition.
Increasing security measures within schools.
Prioritizing the treatment of mental illness.1

Despite public support for these measures, the legislative efforts faced significant opposition from the National Rifle Association and other gun-rights advocates. In April 2013, the Senate failed to reach the required supermajority to pass the expanded background check legislation, and the broader bill was subsequently withdrawn.1