FN 36422 AR-15 Barrel, 5.56 NATO, 16″ Mid-Length

Description

The FN 36422 AR-15 barrel is a 16-inch, cold hammer forged barrel chambered for .223 REM/5.56 NATO and configured with a mid-length gas system. It features a chrome-lined bore and chamber and a matte black manganese phosphate external finish for corrosion resistance. Manufactured from high-grade Chrome Moly Vanadium steel, each barrel is magnetic-particle tested to verify structural integrity. Suited for AR rifle builds where durability, longevity and reliable feeding are priorities.

Key Specifications

• The barrel length is 16″.
• It is chambered for .223 REM/5.56 NATO.
• The gas system is Mid-Length.
• The barrel is cold hammer forged (CHF) from high-grade Chrome Moly Vanadium steel.
• The bore and chamber are chrome lined.
• The external finish is Manganese Phosphate.
• The rate of twist is 1 in 7″ RH.
• The contour is Government.
• The muzzle threads are 1/2-28.
• The barrel weight is 1.9 lbs.

Built to provide long service life and consistent chambering and extraction, this FN cold hammer forged barrel combines proven materials and chrome lining for enhanced resistance to wear and corrosion. Its mid-length gas system and government contour make it a versatile choice for AR builds used in target work, training, and general-purpose applications—providing a durable foundation for a reliable rifle platform.