Bloomberg is implying that there are unlicensed gun dealers on Armslist.com and that "These findings tell us that law enforcement, legislators and web sites all need to take steps to choke off this potentially deadly stream of illegal firearms sales". See how he worded that? Potentially. As usual he has no idea what's really going on. U.S. mayors say thousands of guns sold illegally online Get ready for the "gunshow loophole" style rhetoric all over again. I haven't even checked but I can tell you that he has no figures on how many crimes are committed with guns bought on Armslist. And you can bet that it's less that .01% because BATFE would have been all over them as soon as a trend appeared.