The Faxon patented 16 inches Pencil AR-15 barrel in 5.56x45mm is a premier choice for enthusiasts seeking a high-performance, lightweight solution for their rifle builds. Crafted with precision at Faxon's State-of-the-art facility in Greater Cincinnati, Ohio, this barrel exemplifies superior engineering and craftsmanship. Its pencil profile is specifically designed to minimize weight without compromising on accuracy, making it an ideal component for those who prioritize maneuverability and precision. One of the standout features of this barrel is its integral muzzle brake, which significantly reduces recoil and muzzle rise. This enhancement allows for quicker follow-up shots, providing a tactical advantage in rapid-fire scenarios. The barrel's compliance with the NFA 16 inches minimum length requirement ensures it is both legal and practical for a wide range of applications. Constructed from robust 4150 CMV steel, the barrel is finished with a QPQ nitride coating, offering exceptional corrosion resistance and durability. This ensures longevity and reliability, even under the most demanding conditions. The design accommodates standard gas blocks and barrel nuts, seamlessly integrating with your existing setup. Each barrel undergoes rigorous testing throughout the manufacturing process, from the selection of premium materials - either certified 4150 mil-spec steel or 416-R stainless - to the final inspection. Precision custom hardened Gauges are used to individually check headspace, guaranteeing a perfect fit and optimal performance. Backed by Faxon's Lifetime Guarantee, this barrel is not just a component - it's a commitment to quality and excellence. Whether you're building a new AR-15 or upgrading an existing one, the Faxon 16 inches Pencil barrel is a reliable and efficient choice that delivers on all fronts. 11 degree target crown Integral slim 3-port muzzle brake Twist rate - 1:8 Gas block diameter - 0.625 inches 1.1 gas block journal length M4 barrel extensions Mid-length, button-rifled, pencil barrel Magnetic particle inspection (MPI) for optimal performance to ensure optimal performance, it is essential to conduct magnetic particle inspection (MPI) with precision and adherence to established protocols This non-destructive testing method is employed to detect surface and near surface discontinuities in ferromagnetic materials By applying a magnetic field to the test object and introducing magnetic particles, any disruptions in the magnetic field caused by defects become visible, allowing for accurate identification and assessment Proper execution of MPI requires a thorough understanding of the equipment, materials and techniques involved, as well as strict compliance with safety standards and guidelines