Most people probably remember an article in the media not long ago bemoaning the number of registered firearms in the United States as though that were some indication of an underlying crime spree. It didn't take long for people to point out that Most states didn't have any sort of 'firearms registration' and that the numbers reported were NFA-registered firearms. The ATF has recently published a 2017 edition of the "Firearms Commerce in the United States Annual Statistical Update." The document gives yearly production numbers for pistols, revolvers, rifles, and shotguns, but also breaks down NFA registrations into AOWs, MGs, DDs, SBRs, SBS, and suppressors (Georgia is on page 15/16 because you know you want to go there first). Interesting statistics, remembering that LE likely accounts for a goodly proportion.