And here would be that gray area-ish confusion I’m referencing.Yes. Until tested. Though there was just a case about that where MGA passed a law to clean it up. A little.
On a federal level there is law. Loans across state lines have to be temporary in nature and ATF talks about that a little.
Basically you could loan a firearm for something like a range trip, hunting trip, things like that. Basically you are going to want a real identified beginning and end time and “short” in nature. Not “well so my buddy can take my AR to the range whenever he wants”. But more like “so my buddy could take it to the range to try it the once and give it back.”
If it got tested in Maryland, that will likely prove expensive to anyone who tests it.