The US Supreme Court will soon decide whether to lift a ban on bump stocks, the gun attachments that let rifles fire hundreds of bullets per minute.

The Trump administration banned the stocks by classifying them as machine guns after they were used in the deadliest mass shooting in US history.

Under the 1986 National Firearms Act, owning a machine gun is illegal.

The court will hear arguments on Wednesday in the case and is expected to issue a decision in June.