ATFに2020年銃器製造数の中間報告が出てた
https://www.atf.gov/resource-center/data-statistics
Annual Firearms Manufacturers And Export Report
https://www.atf.gov/file/156011/download ※PDFです
PISTOLS
TO .22 669,321
TO .25 195,784
TO .32 51,303
TO .380 647,927
TO 9MM 3,189,701
TO .50 577,319
TOTAL 5,331,355

REVOLVERS
TO .22 598,083
TO .32 4,124
TO .357 MAG 152,915
TO .38 SPEC 182,938
TO .44 MAG 31,877
TO .50 30,289
TOTAL 1,000,2261