The Klagenfurt court gave the men, aged 74 and 48, jail terms of 24 and 20 months respectively after they were found guilty of supplying around 820 hand guns and dozens of Kalashnikov assault rifles to the group since 2011.
The duo denied knowingly dealing with the mafia, claiming they had thought they were working with “vegetable traders”.
They can still appeal the verdict.
A Naples prosecutor announced in March that Italy and Austria had busted an international arms trafficking ring that supplied the Camorra with guns, including “weapons of war”, to start a war with other mafia clans.
The Camorra is one of Italy’s three main organised crime groups, along with Sicily’s Cosa Nostra and the ‘Ndrangheta, based in Calabria.