Well, Dumais wrote recently that there are at least 60,000 assault weapons in Maryland according to MSP records, and that does not count the ones that were purchased prior to them being classified as "regulated firearms".
If an AR15 is not one of the most popular rifles around, I will be shocked. As shocked as I am that the Baltimore Sun actually printed that. WOW Kudos to the Baltimore Sun though if that was not a mistake on its part.