The Benelli Pasion is a semiautomatic shotgun operated by an inertial system , featuring a geometric locking phase driven by an oscillating block. The inertial system delivers the power of a locked breech shotgun, concentrating 100 percent of the gases behind the shot wad for extra power and range .The PASION semiautomatic can handle anything from 2 34 " ( 70 mm ) loads to the heaviest 3 " ( 76 mm ) magnums.