Some New York state lawmakers want to make it illegal in the state to buy, sell or possess devices known as bump stocks that allow semi-automatic rifles to mimic the rapid fire of automatic weapons.
Authorities found 12 of the devices fitted to guns in the hotel room of Las Vegas shooter Stephen Paddock.
It is illegal to use bump stocks in New York state but a loophole in the law makes it legal to buy, sell or possess the devices.
Legislation introduced this week would immediately ban bump stock sales and, over time, prohibit possession of them.
Democratic Assemblywoman Pat Fahy of Albany says it's illogical to allow the sale and possession of a device that cannot be used legally.
The bill has bipartisan support. Lawmakers will reconvene in Albany in January.