I am familiar only with the Benelli. I assume the Beretta recoil system is identical since they own Benelli. The Benelli system works quite differently than a Browning Auto 5 or a Colt M1911, for instance. In the Benelli, the bolt is a 2 piece affair, with a bolt body separate from the bolt head, which locks into the barrel extension. The body and head are joined by a coil spring in between. Upon firing, recoil causes the whole gun to recoil rearward. Since the bolt body is not locked to the barrel, it tends to remain stationary due to inertia. When the gun recoils and the bolt body remains stationary, the bolt body compresses the bolt spring between the body and the head. When the spring then rebounds, it forces the bolt body rearward, taking the bolt head with it, unlocking the head and allowing the bolt to function. It is exceedingly simple and reliable, but does require a certain amount of recoil velocity to work. The lightest loads may not work, but if you hold the gun more loosely, it may work. This is also backwards from most recoil systems. Just remember, the gun itself must move in recoil for the action to function. Also, it kicks a bit, but it is very very clean due to no gas system. Hope this helps.
