http://www.freerepublic.com/focus/news/771086/posts
A firearms safety instructor said the FBI has been asking registered owners of .223-caliber guns to bring them in for ballistic fingerprinting.
"They're looking for suspects," said Mike Heffernan, owner of Self Defense Technologies in Kensington. "They're looking at people who have a background in firearms, possess .223 weapons, and have the capability of using them."
"Asking" seems to be a euphemism for threatening if the reports are true. (Though not too surprising for FBI SOP IMHO.)
What does 'registered' mean? All of my firearms have been bought legally with the appropriate paperwork, but so far as I am aware, none of them are 'registered' ... this sounds suspiciously like a central database of gun owners with their types of weapons, and available to law enforcement. Correct me is I am wrong, but that is not supposed to exist.