By a vote of 114 to 55, the state's House late on Tuesday, May 1 passed the so-called bump stock ban, according to multiple news reports.
Bump stocks are rapid-fire devices that enable guns to fire like automatic weapons.
The measure must be approved by the state Senate to become law in Connecticut.
Bump stocks were used in the October 2017 shooting at a Las Vegas concert that left 58 people dead and more than 800 others injured.
Democratic Gov. Dannel Malloy proposed the ban earlier this year.
Proponents say the bill is needed to protect the public, but opponents call it unnecessary.
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