Parliament's watchdog public accounts committee Scopa on Tuesday demanded an explanation from Defence Minister Lindiwe Sisulu about missing weapons.
According to a report by the auditor general, an estimated 82 000 weapons belonging to the South African National Defence Force (SANDF) and the Navy are unaccounted for.
A staggering 72 000 out of 82 000 missing weapons belong to the army.
The defence department says that it cannot say the weapons are missing or stolen because they could simply not be properly registered.
The department has a project planned to address the discrepancies within the assets registry, but it could take up to 18 months to complete.