DISC Yankee Hill Machine Low Profile Gas Block Assembly YHM-9381A
This gas block replaces your existing front sight to provide a simple,
low profile design that can be used to mount a rifle length forearm to a
carbine length barrel. It is mounted by the use of two set screws.
Manufactured from high quality steel and finished with a mil. spec.
phosphate coating. This gas block has a bore diameter of .750 inches.