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? hex wrench and dictation tool included in the DIctator gas block kit. The DIctator features a straight gas tube but why? 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. Each DIctator gas block kit comes complete with the applicable length gas tube. The available lengths are pistol carbine and mid-length and rifle. This gas block is setup for barrels manufactured for a .750 gas block.