The Bofors40mmAutomaticGunL/60 (often referred to simply as the "Bofors40mmgun", the "Boforsgun" and the like, see name) is an anti-aircraft autocannon
The 2-pounder gun, officially the QF 2-pounder (QF denoting "quick firing") and universally known as the pom-pom, was a 40mm (1.6 in) British autocannon
writers are usually referring to by 3-inch AA gun. The gun was based on a prewar Vickers naval 3-inch (76 mm) QF gun with modifications specified by the