Big Country is right - if the offense charged is NOT a felony, you are not committing another offense by answering that you are not under felony charges. Exactly how IS that offense classified in MD? Is it a felony,misdemeanor, or merely a "violation". Basically, such classifications can be determined by the prescribed punishment. Generally, a misdemeanor can carry up to a one-year jail term, which is usually served locally(county jail). Felonies carry possible sentences of over one year, and generally involve the possibility of state-level incarceration. A violation is usually punishable by a short local jail term or just a fine.

Misdemeanor offenses and violations rarely result in the imposition ofcivil disabilities, including voting, firearms purchases, etc., as long as NO DOMESTIC VIOLENCE was involved in the offense......

BUT, "Are you an unlawful user of, or addicted to, marijuana, or any depressant, stimulant, or narcotic drug, or any other crontrolled substance?"

If you answer "YES", then it is likely that you are going to be precluded from purchasing ANY kind of a firearm! AND, should you answer NO, you are committing the federal felony of perjury. Perjury BAD! In all probability, you will be caught! Maybe not that day, but some time the Feds may come a'knockin' on yo' door! Most likely, it will be a SURPRISE!!