Sons of Liberty Gun Works Liberty Gas Block Features The Sons of Liberty Gun Works Liberty Gas Block is machined from 4140 heat treated steel a material chosen for its strength and resistance to the heat and pressure cycling that occurs every time the rifle cycles. Sized for a .750 inch gas port it is compatible with the vast majority of mil-spec AR platform barrels using that common gas port diameter. The block is designed to sit precisely on the gas journal shoulder ensuring correct alignment with the barrel s gas port for consistent reliable cycling. Knurled set screws are included to secure the block in place during the build process before final pinning. Finished in a durable nitride coating the Liberty Gas Block resists corrosion and wear far better than a bare steel finish standing up to carbon fouling and moisture exposure over years of use. Being ready to be pinned gives builders the option of a more permanent secure installation for rifles intended for hard use or duty applications. Sons of Liberty Gun Works builds its small parts to fit most mil-spec AR platform rifles making this gas block a dependable choice for a wide range of builds. The Sons of Liberty Gun Works Liberty Gas Block is for sale at GrabAGun for builders who want a durable precisely fitted gas system component. Sons Of Liberty Gun Works Liberty Gas Block Specifications Manufacturer: Sons Of Liberty Gun Works Model: Liberty Gas Block Color: Black Material: 4140 Heat Treated Steel Finish: Nitride Gas Port Diameter: .750 Includes: Knurled Set Screws Available At: GrabAGun