The 20 mm modèle F2 gun is a naval defence weapon used by the French Navy.

The companies DCN and GIAT were contracted to design the F2 20 mm cannon, essentially a navalised version of the M693 gun used by the French Army, and sold for export.

The 20 mm F2 is a mounted monotube gun, with two 150-cartridge boxes on each side of the piece.

The gun is manoeuvred by the body of the gunner, who is attached to the weapon.

In the French Navy, they are used aboard: This article relating to artillery is a stub.