danb
dont be a dumbass
One angle I haven't heard attacked yet is related to the fact that courts have ruled it isn't an all out carry ban because open carry of long guns is legal.
But MD law makes carrying a loaded rifle in motorized vehicles illegal (DNR regulation to prevent poaching?). Therefore, by not approving concealed carry permits one should be able to argue that the state has a defacto ban on carrying of firearms because you can't carry or transport loaded firearms in your car without a "may issue" license.
There is in fact an outright ban in Baltimore City. Open carry of rifles is illegal. Since this is a suit against the state, likely one would have to challenge BC separately.
For practical purposes, this argument is barely a fig leaf. After all, whats the rationale for open carry of rifles for self defense and not (holstered) pistols? Pistols are the "quintisessial self defense weapon" per Heller majority.