AB Bofors (UK: / ˈ b oʊ f ər z / BOH-fərz, US: / ˈ b oʊ f ɔːr z / BOH-forz, [1] [2] Swedish: [buːˈfɔʂː]) [check vowel length] is a former Swedish arms manufacturer which today is part of the British arms manufacturer BAE Systems.

BAE Systems Bofors is a defence company within BAE Systems that develops and integrates weapons systems. BAE Systems Bofors has extensive cooperation with subcontractors both in the local area and internationally.

The Bofors 40 mm Automatic Gun L/60 (often referred to simply as the "Bofors 40 mm gun", the "Bofors gun" and the like, [3][4] see name) is an anti-aircraft autocannon, designed in the 1930s by the Swedish arms manufacturer AB Bofors.

Bofors 40 mm gun is a name or designation given to models of 40 mm calibre automatic anti-aircraft guns designed and developed by the Swedish company Bofors: Bofors 40 mm Automatic Gun L/43 - developed in the 1930s with market entry …

The low weight and compact Bofors 40 Mk4 gun system with its high rate of fire and ability to switch between optimized ammunition types – including the intelligent 40mm 3P all-target ammunition – provides high survivability and tactical freedom at all levels of conflict.

The name Bofors is strongly associated with the 40 mm anti-aircraft gun used by both sides during World War II. This automatic cannon is often simply called the Bofors gun and saw service on both land and sea.

The Swedish-designed rapid-fire Bofors 40-mm gun was the most widely used antiaircraft weapon of World War II. In the 1939–45 conflict, the Bofors was in the arsenal of most Allied and Axis nations and in all theaters of the war. The U.S. Army had a large number of them, and they were the U.S. Navy’s most widely used shipboard gun.