The Faxon Firearms AR-15 Pinned Gas Block is a lightweight and durable barrel designed for precision and reliability. Weighing just 1.2 lbs this 16-inch pencil contour barrel is chambered in 5.56x45 NATO and features a sleek black nitride finish for enhanced corrosion resistance. It employs a mid-length gas system for smoother operation and improved shooting comfort. The barrel is equipped with a 1/2-28 muzzle thread ideal for attaching various muzzle devices and boasts a 1-8 twist rate for optimal stabilization of a wide range of bullet weights. Tailored for the AR-15 platform this barrel is an excellent choice for those seeking a balance of performance and weight reduction in their firearm build.