The 5.7 cm Maxim-Nordenfelt "Canon de caponnière" was a fortress gun and infantry gun developed during the 1880s in Britain which was sold to Belgium and later produced under license by the Cockerill company.

It saw action during World War I in both Belgian and German hands.

It was a typical built-up gun of the period made of steel with a vertical sliding-block breech and it fired fixed QF ammunition of a number of different styles.

The guns were mounted on light two-wheeled box trail carriages without a recoil mechanism and protected by a three-sided gun shield.

The Germans also mounted a number guns on central-pivot mounts on flatbed truck chassis to act as mobile anti-tank guns.