Long gun reporting requirements imposed
Here's a discussion. They're using the existing regulation on "letter requests," which was traditionally used to require individual dealers with apparent problems to report their sales, rather than to require dealers to report en masse.
It helps if gun policies are written by people who understand guns. It applies to semiauto long guns with detachable magazines that have "A caliber greater than .22, including .223 caliber firearms." The inclusion of .223 indicates that "greater than .22" means as defined in thousandths of an inch, that is anything over .220. So are .22 rimfires covered? Their bore is .218, measured land to land, or ..222, measured groove to groove. To be fair, This is from the proposal; I can't find the final form of the requirement online.