John, it is inertia style action, straight from RIA web site. >>> armscor.com/firearms-list/lion-tactical-sa-12ga-4rd .....Have a great day!

John, It is Inertia Action Operation. The action is actually smooth. This 12GA shotgun operates with an inertia style action and features a lightweight aluminum receiver with a 4+1 capacity. Comes with light weight polymer furniture and 18.5" barrel with Modified, Improved Cylinder & Full choke tubes makes this a sporting shotgun that can approach any defense situation. Chambered for both 2-3/4 inches and 3 inches shotshells.