20 round mags are the limit in Merryland, I can’t legally order one and have it shipped to the house but if I buy one in Virginia I can legally transport it in my car back here.
I would “assume” that’s like most states.
What Tom is missing here on the Devon incident is
“Do not prohibit me from taking action”
We can work all this stuff out in court but do not pass laws that prohibit me from taking action to defend mylife or the life of innocent others.