Qalyoubiya police have conducted a wide scale campaign to arrest outlaws and fugitives in the Delta city.
Nine machine guns, 35 pistols and 315 bullets have been seized during the campaign.
Six stun grenades have also been seized.
A workshop manufacturing firearms has also been discovered.
Two fugitives, who have been at large since the January 25 Revolution, have been re-arrested.
Four suspects have also been captured.
All legal measures have been taken and the prosecution has been notified to start probes.