FN America Rifle Barrel for AR-15 556 NATO – 18″ Length, Rifle Length Gas System (20-100042)

• Rifle barrel designed for AR platform firearms chambered in 5.56 NATO caliber
• Features 18 inch barrel length for extended range and improved velocity performance
• 1 to 7 twist rate stabilizes various projectile weights effectively
• Button rifled construction ensures consistent accuracy and internal barrel uniformity
• Rifle length gas system supports smooth operation and reduced system stress
• Chrome lined bore and chamber enhance corrosion resistance and barrel longevity

The FN America 18″ 556NATO 1:7 Twist Button Broached AR-15 Barrel Black is a rifle barrel designed for AR-15 platform builds and replacements. This rifle barrel features an 18 inch length with a 1:7 twist rate and is chambered in 5.56 NATO, providing a rifle-length configuration for compatible platforms.

The FN America rifle barrel is manufactured from chrome moly vanadium steel with a button-rifled bore and chrome-lined chamber and bore for durability. It includes a rifle-length gas system and M16 contour profile, and is high pressure tested and magnetic particle inspected for quality control. In practical use, this 18 inch barrel is used for AR-15 rifles requiring a rifle-length gas system and 5.56 NATO chambering. The matte black finish supports corrosion resistance, and the barrel is categorized under rifle barrels for AR platform components.