Kaw Valley Precision AR-15 Standard Gas Block Features The Kaw Valley Precision AR-15 Standard Gas Block is machined from steel sourced in the USA built to handle the heat and pressure cycling of an AR-15 gas system without deforming or losing its fit over time. It is sized for a .650 inch gas block journal a diameter found on select AR-15 barrel profiles. A black oxide finish provides a layer of corrosion resistance helping the block withstand carbon fouling and moisture exposure during regular use. Two 10-32 set screws spaced 0.400 inches apart clamp the block securely to the barrel using a 3/32 inch Allen wrench. A properly fitted gas block is essential to reliable AR-15 function since it regulates how gas is redirected from the barrel to cycle the action. This standard non adjustable design keeps the build simple and dependable for shooters who do not need to fine tune gas pressure. Steel construction gives the block the strength to resist wear from heat cycling far better than lighter alloy alternatives over the life of the rifle. For AR-15 builders working with a .650 inch profile barrel this Kaw Valley Precision Standard Gas Block is available for sale at GrabAGun. Kaw Valley Precision AR-15 Standard Gas Block Specifications Manufacturer: Kaw Valley Precision Model: Standard Gas Block Compatible Hosts: AR-15 Size: .650 Material: Steel Finish: Black Oxide Set Screw: 10-32 .400 Spacing Available At: GrabAGun