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Flak Cannon
Flak Cannon (1 barrel).png
A single barrel version at the Ular Boys HQ.
Weapon in Just Cause 2
Type Anti-aircraft artillery
Usage Mounted on a fixed stand
Maximum ammunition in the weapon Infinity
Cost Unknown
List of owners Ular Boys
Panau Military
Japanese Military
United States of America (according to Maria Kane)

Flak Cannons are anti-aircraft weapons in Just Cause 2.

See Artillery for any other similar weapons.


The 4 barrel version at a Japanese bunker, on Hantu Island.

There are two types of Flak Cannon in the game. One has one barrel and has a low rate of fire, similarly to the the Auto Cannon on some armored cars. The other has four barrels and fires much faster, but the damage of single bullet decreases.

Both versions have an identical stand and an operator's seat on the left side of the weapon.

According to Kane, those guns were sold to Panau by the United States and she recognizes them by their sound.


Both versions are usually found at military facilities, but there are exceptions to both.

Single-barrel version

The single-barrel version is usually deployed at such locations, where they are probably meant to have a second use as an anti-ship weapon.

Four-barrel version

The emplacements are sometimes surrounded by sandbags.

Use and performance

The only time they are ever used by anyone other than Rico is in the mission "Welcome to Panau", where the Panau Military shoots at the Agency H-62 Quapaw helicopter but misses most of their shots. One manages to connect with the chopper and send 5 memory cards falling into a base.

The four-barreled version has a much faster rate of fire than the single-barrel version. They can make quick work of helicopters (dealing damage far more quickly than the Minigun) and their shells seem to have some kind of proximity explosive effect, meaning near-misses will also deal damage.

The single-barrel version fires and traverses slower, but does more damage in a single shot. It is effectively a fixed version of the main gun of the GV-104 Razorback and SV-1007 Stonewall. The sound is actually the same.

It is not recommended to use either Flak Cannon to fight helicopters except when they are approaching at a low level since the guns traverse slowly and so Rico can be overwhelmed before he can bring the weapon back down to shoot at infantry. The shells take time to travel to their target, so it is recommended to lead a moving target slightly. Neither version of the weapon can shoot directly up, though since only the Sivirkin 15 Havoc can shoot straight down this is not actually as much of a problem as it may at first seem.

Flak Cannons are very effective against armored vehicles and ships, with the four-barrel version also good at dealing with infantry.

Realistically both versions would need more than one crewman: the real-life version of the four-gun mount required a crew of eight (three seated on the gun itself, a spotter and a four-man loading team).


  • The name comes from the German designation for anti-aircraft guns which first entered use in WW1 - "FlaK". It's a contraction of "Flugzeugabwehr-Kanone" or "Flugabwehr-Kanone" (hence the capital K in the names of the German weapons), meaning "anti-aircraft cannon." In English, it quickly lost the capital K and became a term for fire from such weapons.
  • The single-barrel version seems to actually be based on a howitzer of some kind, while the 4-barrel version is a WW2-vintage German 2cm Flakvierling 38.
  • The four-barrel version is shown not loaded since it lacks magazines.
  • The Just Cause 3 successor to this weapon is Capstone FH155.


Main article: Just Cause 2 Weapon glitches.

Some people have experienced glitches while trying to rotate the single barrel version. The glitch causes the barrel to start shaking. At this time there is no known fix for this, but it's only been reported to happen in the PC version of the game.