MD is arguably the worst of all.
They have an AWB, an "approved handguns roster", and total handgun registration (including new movers who bring handguns with them) and permit to purchase. Even transporting a registered handgun (unloaded, locked in the trunk) requires their "Carry and Wear Handgun Permit". Getting one of those makes NYC look like NH.
Maryland has an official stance of not recognizing FOPA or LEOSA.
Oddly enough, they don't ban silencers.
You dont need a permit in Md to transport to/from home and range or gun shop
Any other transport other than to out of state requires a carry permit.......which is unpossible to obtain in Md unless you are politically connected....even armed guards have stoopid hoops to jump thru