The CN120-26, also simply referred to as Modèle F1 (F1 model) is a French smoothbore 120mm tank gun of 52 calibers designed by the EFAB of Bourges and produced by Giat Industries .

The 120 mm smoothbore gun F1 has been designed for installation in the Leclerc main battle tank.

The smooth-bore gun is chrome-plated, fitted with a thermal sleeve and has a vertical sliding breech mechanism.

It is also fitted with a muzzle reference system (MRS) and the tropicalized variant of the Leclerc is fitted with a compressed air system for removing propellant fumes.

[2] In the Leclerc application, the gun is fed by a 22-rounds bustle-mounted automatic loader designed by Creusot-Loire Industries.