UPDATE: I got this one wrong. It is the Beretta 1301 Competition. I want! (Thanks Tyler for identifying it).
About 20 minutes ago someone at @Beretta_USA, the official Beretta USA twitter account, tweeted the above photo with the message “Having dinner with the team. Tomorrow we shoot this.”. The shotgun appears to be a Beretta Tx4 Storm with an enlarged tactical-style charging handle and a ribbed barrel with fiber bead sight. It looks to me like this is a prototype of a gun that will sit somewhere between the fully-tactical Beretta Tx4 Storm and a more traditional Beretta A300 and A400.