Well not really, you’ve still got the Feds to worry about but Maryland's highest court just held that Section 5-142 of the Public Safety Article which prohibits the obliteration, removal, change or alteration of the manufacturer’s identification mark or number on a firearm, has no related penalty provision, and is therefore not a crime.
Evans v. State, No.72, September Term 2010
Evans v. State, No.72, September Term 2010