The Kies adjustable gas block is designed so that you can tune your rifle's gas system to your load, reduce over gassing of the system to help smooth your rifle's action, or to enhance reliability when using a suppressor. Made of 4140 and Melonite finished.
For use on barrels using a .750 diameter gas block.

These will fit under MOST handguards. To ensure fit make sure ID of handguards are 1.75" ID.

These new Gen2 gas blocks are threaded to accept a gas block screw (included with the appropriate allen wrench) to alleviate the headache of messing with a roll pin and for a more secure lockup.