Bruno Civolani, an Italian engineer born in 1922, revolutionized shotgun design with his inertia-driven action in the 1960s. While not the first to develop an inertia system, as Carl Axel Theodor Sjogren of Sweden had previously worked on a similar concept, Civolani’s design significantly improved upon earlier attempts.Civolani’s fascination with firearms began in his youth, and he was inspired by Axel Sjögren’s recoil-operated shotgun.