This Externally Adjustable Regulator (E.A.R) allows you to change the pressure settings without needing to empty the tank and then adjusting, and it also has a wider adjustment range between 60 and 240 BAR, while the standard regulator is accurate only between 70 and 160 BAR. This is the best Regulator on the Market.
If you like to switch between power settings rather often then this new regulator will enhance your shooting experience!
PLEASE TAKE INTO CONSIDERATION:
As the E.A.R is longer than the Standard Plenum used with the Standard Regulator, you need to install the compact butt extension in order to maintain the total length of the complete butt.
In the image below you can see how the complete butt with Compact Butt Extension and E.A.R installed looks like: