Kharn
Ultimate Member
Question on serializing: Can you legally serialize a pistol in MD if you don't have an HQL?
Whatever alphanumeric sequence you decide to scratch with a sharp piece of steel, cut with a dremel, or burn with a soldering iron, into the receiver? Homemade firearms aren't required to be marked, the ATF suggests you do so in case it is lost or stolen so it can be returned to you.
If you do mark it, note that the ATF only recognizes serial numbers that have at least one number in them. All letters are not accepted in their databases if you should later register it as an NFA item.