The PRI Low-Profile Gas Block covers one-inch of the barrel’s surface and is made to the tightest tolerance. AR15 - M16 Pri Stainless Steel Gas Block - Pri Steel constructed gas block for the AR15 - M16 .750 diameter bore.
This is the samedesign as the original low profile gas blocks but the addition of some adustments. The gas block offered in the .750 diameter.
Installation and legal note: The installation of the PRI Low-Profile Gas Block should be performed by a qualified gunsmith and/or certified armorer.