stuuuuupid
bill as signed by council president includes...
(2) Bump stock shall mean any device for a pistol, rifle, or shotgun that increases the rate of fire 18 achievable with such weapon by using energy from the recoil of the weapon to generate a 19 reciprocating action that facilitates repeated activation of the trigger.
and also includes this gem in what is a banned assault weapon
... including a detachable magazine with a capacity of twenty-one (21) or more than15 fifteen (15) rounds
they must not have firearms preemption over there.