The majority of the US Supreme Court, decided yesterday, using obscure technical reasons, that a bump stock, a device which in 2017 allowed a Las Vegas shooter to fire more than 1,00 rounds of ammunition in 11 minutes, killing 60 people and wounding 413 others, could not be regulated by the ATF as it did not meet the technical definition of a machine gun, and thus not banned under the 1934 National Firearms Act.