The Adjustable Comp is the first and only adjustable comp on the market today specifically developed for the AR 15 rifle. Select from three different gas port openings that allow you to choose how much gas is directed upward. This device can be adjusted to your rifle to allow for variations in factory and hand loaded ammunition by pushing and rotating to desired port. No tools needed! 1/2×28 tpi. Includes crush washer.

Weight: 3.8oz