The design of this gas block allows the user to mount forearms that
extend beyond the standard gas return system. Provided the inside
diameter of the forearm is 1-5/8” or greater. It allows the mounting of
our forearms without the removal of your pinned or welded muzzle
accessory. This gas block consists of a simple, durable, two-piece
design that is mounted by the use of four socket head cap screws using a
7/64" Allen wrench. Made from high quality steel and finished with a
Mil. Spec. phosphate coating.