Ten House Republicans backed a token vote on Wednesday to raise the minimum age to purchase a semi-automatic rifle from 18 to 21.
Defectors voted to retain language increasing the age of purchase in House Speaker Nancy Pelosi’s sweeping gun control package.
Republican Representatives who voted with Democrats included Representatives Fred Upton of Michigan, Adam Kinzinger of Illinois, Brian Fitzpatrick of Pennsylvania, Chris Smith from New Jersey and Maria Elvira Salazar from Florida.
GOP Representatives Mike Turner and Anthony Gonzales of Ohio also supported the measure, as did three Republican members of the New York delegation – Representatives Nicole Malliotakis, John Katko and Chris Jacobs.
Mr Jacobs was recently forced to drop out of his re-election bid after speaking out in favor of a ban on military-style assault weapons.
Two Democrats, Representatives Jared Golden of Maine and Elissa Slotkin of Michigan, voted against the provision.
The bill, known as the Protecting Our Children Act, died upon arrival in the equally divided Senate.
Not only does this increase the minimum age required to purchase a semi-automatic rifle from 18 to 21, but it also limits gun magazines to a maximum of 10 rounds. The legislation also requires that existing bump stocks be registered while prohibiting the sale of civilian use bump stocks.
The package also includes a bill that would encourage states to pass “red flag” laws that allow authorities to confiscate firearms from people a court deems dangerous.
Moderate House Democrats initially wanted to split the package and vote on the various provisions individually. Ms Pelosi struck a deal, however, allowing lawmakers to vote on whether individual bills would be included in the package.
This ruling allowed moderate Republicans and conservative Democrats to vote for or oppose parts of the legislation, without having to vote for it as a whole.