Bigger issue for you would be purchasing on - line and and finding an ffl that will ship to MD.... your best bet is to visit a local shop and oedering one IMHO
^^^^^ no - you can get it. The lgs has to pin the mags permanently or you just don't get the mags that came with the gun.....for a while some shops were willing to ship the mags out of stste but I don't know if any shop is doing that anymore.
^^^^^ as long as it's on the MD roster and the mag is pinned or other contraptions to limit the capacity to 10 then you are gtg .... Check with your lgs that you will.be purchasing from
If you are asking strictly about the magazine then it should be fine as long as the manufacturer is selling...