The Yankee Hill Machine 9383 is a replacement gas block that offers a minimalist, low profile design. This versatile addition facilitates the mounting of a rifle-length forearm on a carbine-length barrel. Installation is straightforward, requiring only two set screws. Constructed from superior quality steel and finished with a military-specification phosphate coating, this gas block promises durability and performance. Its dimensions are compact, with a length of 0.95\" and a bore diameter of .75\". Upgrade your firearm with the Yankee Hill Machine gas block for enhanced functionality and improved aesthetics.