I just purchased one at a local gun store. The first Benellis available to the civilian market will be limited to 2500. These are a commerative version and have an american flag laser etched on the receiver and special serial numbers (1 - 2500).
The shotgun comes standard with a 4 shot mag tube, pistol grip stock, and ghost ring sights. There will be a 2 shot mag extension and a fixed stock available in the near future.
The shotgun supposedly has had fantastic reviews from the military. I am hopeful the recoil will be less than that of the M1 due to the new gas system.
I just bought one, love the Flag. I bought it more as a collector since there will be only 2500 with the flag, so I havnt shot it yet. They say telescopic stock but mine doesnt notch in the forward position but love the way the stock turns sidways. I guess this feature is to shoot around corners. I hear the marines adopted this Shotgun.