Others have tried to follow, but the Xtrema2 remains the choice of serious waterfowlers. The truth is that that no other inertia or gas autoloader can match the Xtrema2 for corrosion protection, reliability, recoil reduction, and simplicity of maintenance. The unique gas operation system, patented by Beretta, with self-cleaning gas cylinder and piston, is provided with a self cleaning exhaust valve that automatically vents the excess gases of the most powerful cartridges. Beretta's new Kick-Off hydraulic dampening reduction system reduces recoil an astounding 44% more than its closest rival by using two hydraulic recoil dampers incorporated into the stock "spacer" unit. The recoil energy is gradually dissipated by the hydraulic dampers, resulting in superior comfort for the shooter. Black synthetic stock. Optima+ bore field chokes included.