The agency releases gun production numbers, along with import and export figures, in its Yearly Firearms Manufacturing and Exportation Report. “Production” is defined from the ATF as “firearms … manufactured and disposed of in commerce” — or sold — “during the calendar year.” Barrel size: SMLE No. one Mk III: https://cristianhoyin.wikikali.com/1326694/top_latest_five_kk_guns_and_ammo_urban_news