The US House passed a broad gun bill on Wednesday that will raise the minimum age to buy an assault rifle in the United States from 18 to 21, despite the fact that the proposal is unlikely to pass the Senate.

The Protecting Our Kids Act would also prohibit the sale of large-capacity magazines and impose new standards governing proper at-home gun storage. The chamber adopted it by a vote of 223-204.

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The House earlier voted 228 to 199 to include the purchase age provision in the broader law, which has come under fire after two recent mass killings carried out by 18-year-olds. Democrats endorsed the idea in a mostly party-line vote, with five Republicans supporting it and two Democrats opposing it.

Following last month’s mass shootings in Buffalo, New York, and Uvalde, Texas, which killed 31 Americans, the package is a compilation of numerous pieces of legislation meant to limit access to weapons and other firearm equipment.

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Another provision of the bill, known as the Untraceable Firearms Act, would strengthen restrictions governing so-called ghost guns, or firearms that lack a serial number. It is significantly more difficult for law enforcement to track handgun ownership and possession when there are no serial numbers.

While the Democratic House majority is anticipated to adopt stricter gun legislation, their triumph will be primarily symbolic. Senate Republicans, who have the ability to stall legislation with a filibuster that requires 60 votes to break, are united in their opposition to the House’s gun restrictions and will obstruct their passage.

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Because of the Senate’s 50-50 divide, with Vice President Kamala Harris serving as the deciding vote, Democrats must convince 10 Republicans to support any legislation. A bipartisan group of senators is drafting a narrower compromise package that would enhance background checks, expand mental health care, and increase school security.

According to political commentators, neither the May 24 elementary school shooting in Uvalde, Texas, nor the May 14 racist rampage at a supermarket in Buffalo, New York, are likely to elicit enough support for the House-passed law.

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A gunman killed 19 children and two teachers at Robb Elementary in Uvalde, while the attacker in Buffalo’s predominately Black area killed 10. Both shooters were 18 years old and armed with AR-15 assault rifles.

On Wednesday, parents of the victims, law enforcement authorities, and one 11-year-old Uvalde shooting survivor testified before Congress, urging lawmakers to approve stricter gun regulations.