This 9 position adjustable DI gas block provides the ultimate range of adjustability and versatility. The addition of a suppressor typically increases the level of back pressure within the rifle system. This increase will prematurely wear parts and increase the amount of gas/carbon introduced into the chamber. With the Dictator, you can now control that rate of fire, gas flow and ultimately the reliability of your system.This 9 position adjustable DI gas block provides the ultimate range of adjustability and versatility. The addition of a suppressor typically increases the level of back pressure within the rifle system. This increase will prematurely wear parts and increase the amount of gas/carbon introduced into the chamber. With the DIctator, you can now control that rate of fire, gas flow and ultimately the reliability of your system. Adjusting the gas system is easy, the front of the gas block has a dial that accepts a flat screwdriver, 3/32 inches hex wrench and dictation tool included in the Dictator gas block kit. The advantage of a straight gas tube is that we eliminate the heat buildup that exists at the bent portion of a standard gas tube. This feature is extremely important for select-fire and/or suppressed rifles which are subject to very high heat levels. By reducing the built up heat, you now have a more reliable, longer lasting gas system.