Birmingham Small Arms Company
 This article is not about Gamo subsidiary BSA Guns (UK) Limited or BSA Company or its successors.The Birmingham Small Arms Company Limited (BSA) was a major industrial combine a group of businesses manufacturing military and sporting firearms; bicycles; motorcycles; cars; buses and bodies; steel; iron castings; hand power and machine tools; coal cleaning and handling plants; sintered metals; and hard chrome process.At its peak BSA was the largest motorcycle producer in the world.