Brand: AIM Sports Includes: Low Profile Gas Block, Set Screws Materials: High Quality Steel with Weather Resistance Coating Compatibility: Standard Barrels 0.750" Weight: 0.138 lbs Length: 0.95 in Bore Diameter: 0.750 in Color: Matte Black Low Profile Gas Block replaces the existing front sight and provides a simple, streamlined design that can be used to mount a rifle length forearm to a carbine length barrel. The standard Low Profile Gas Blocks measure .950 Inches long and are manufactured from high quality steel with weather resistantance coating.