BATF report on firearms manufacture
Right here. Very interesting trends. In 1986, a total of three million firearms were produced. In 2013, it was well over ten million. Pistols (here used to mean semiauto handguns) totaled over four million in 2013 -- so the number of handguns made in that year was greater than total firearms production in 1986. Total gun production doubled, repeat doubled, between 2010 and 2013.
Looking at Exhibit 1a, by the early 2000s, production was about what it'd been in the late 1980s, with about the same distribution except that the proportion of revolvers had declined. The current surge in production began in about 2005-2006, and became spectacular after 2010. The only product that hasn't expanded much is shotguns. Everything else, rifles, handguns, and "misc. arms," have had their production greatly increase. Even "miscellaneous firearms" went from 4,000 to 495,000 over 1986-2013.
(2013 is the latest year reported -- reports are delayed since manufacturers want exact production figures treated as trade secrets and kept quiet for a time).