MD.... does not issue non-resident permits at all
You will find Maryland's "Wear & Carry" application here:
https://mdsp.maryland.gov/Organization/Pages/CriminalInvestigationBureau/LicensingDivision/Firearms/WearandCarryPermit.aspxThe form does indicate there are provisions for out-of-state applicants:
Out of state residents applying for a Handgun Permit must submit electronic fingerprints from a Maryland State Police approved electronic fingerprint processing center.
and also:
Out of State Registration for Security Systems...
Fees Required:
Out-of-State Registration - $15.00 (does not include background check fee)
and in the "Applicant Information" section, the drop-down for the Applicant's state of residence does allow for the selection of the state of DE (among others).
Now, with that said, I will recognize that although the state may accept
applications from out-of-state residents, I would expect the issue rate for such to be nearly zero. Regardless, there must surely be some armed security guard, or armored vehicle driver, who works primarily in Maryland, but lives in DE or PA. No?
Oh, and a cheerful "Hello" to our new member, GlockLady.