MEGA KICK OFF UNIT A400 XKick-Off Unit Black - Model A400 Xtreme Shotgun - Beretta A400 Xtreme Kick-Off Unit. This part is a Beretta A400 factory OEM part. Made to the same factory specifications, materials and standards as the parts currently in your Beretta A400ifications, materials and standards as the parts currently in your Beretta A400 Shotgun. Feel sShotgun. Feel s