Low pressure is quite the rage lately.
Low pressure is not cheap but it can be done effectively. That is they aren't using blowback gasses to recock the marker the way an F4, Spyder or other marker of that type do. There are a few things to keep in mind however, as a low pressure setup can be either extremely efficient if done correctly or overly inefficient if done wrong. Keep in mind that you shouldn't be trying to lower the pressure, you should be trying to increase you efficiency and low pressure will follow suit. Its a bad idea to set an operating pressure and work to make the marker reach that.