Guntec Low Profile Gas Block Features The Guntec USA Low Profile Gas Block is built with a .625 inch diameter to fit barrels machined to that common gas block journal size. The short version profile keeps the block compact allowing it to sit cleanly under most free float handguards without interference. Steel construction gives the block the strength needed to handle the heat and pressure of the gas system without deforming over time. Despite being built from steel the block remains lightweight enough to avoid adding unnecessary bulk to the front of the rifle. Two set screws positioned on the bottom of the block allow it to be securely clamped onto the barrel ensuring consistent gas system performance shot after shot. A roll pin is included to further stabilize the installation for a secure long-term fit. Finished in matte black the block blends cleanly with most barrel and handguard finishes. Made in the USA the Guntec USA Low Profile Gas Block is a reliable no-frills upgrade for AR builders seeking a durable properly sized gas block for sale at GrabAGun. Guntec Low Profile Gas Block Specifications Manufacturer: GunTec Material: Steel Finish: Matte Diameter: .625 Features: Two Set Screws Roll Pin Included Made in the USA Available At: GrabAGun