FN AR-15 5.56x45mm NATO 20" M16 Profile Button Rifled Chrome Lined Barrel 20100043

SKU: FLX-154335

Vendor FN
Regular price $282.98
Sale price $282.98 Regular price $299.00
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Product Description

The FN 20-100043 is a premium AR-15 rifle barrel chambered in 5.56x45mm NATO, built to military-grade standards for uncompromising reliability and precision. Crafted from U.S.-sourced Chrome Moly Vanadium steel per Mil-B-11595E, this 20-inch M16 profile barrel features button rifling and a cold hammer forged construction, delivering consistent bore geometry and long-term durability. A chrome-lined bore and chamber provide superior resistance to corrosion and heat erosion, dramatically extending barrel life and ensuring dependable chambering and extraction in all conditions. The rifle-length gas system optimizes cycling for smoother operation and reduced felt recoil, benefiting both competition shooters and tactical users. M4-style feed ramps and barrel extension promote reliable feeding, while the matte black Manganese Phosphate exterior finish guards against oxidation and corrosion. Every barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) before leaving the factory, ensuring a product free of microstresses or flaws.

Product Highlights

  • Manufactured from U.S.-sourced Chrome Moly Vanadium steel per Mil-B-11595E for military-specification strength and longevity
  • Chrome-lined bore and chamber deliver outstanding resistance to corrosion and heat erosion, extending barrel life and ensuring reliable extraction
  • Every barrel undergoes High Pressure Testing (HPT) and Magnetic Particle Inspection (MPI) to guarantee a defect-free, precision product
  • M4-style feed ramps and barrel extension provide consistent, reliable feeding for uninterrupted operation
  • Matte black Manganese Phosphate exterior finish protects against external corrosion and oxidation in demanding environments

Specs

  • Brand: FN
  • MPN: 20100043
  • UPC: 845737008550
  • Caliber: 5.56x45mm NATO (.223 Remington)
  • Barrel Length: 20"
  • Profile: M16
  • Rifling Method: Button Rifled
  • Gas System: Rifle Length
  • Material: Chrome Moly Vanadium Steel (Mil-B-11595E)
  • Exterior Finish: Manganese Phosphate (Matte Black)
  • Bore/Chamber Lining: Chrome Lined
  • Barrel Features: M4 Feed Ramps, Threaded Muzzle
  • Fluted: No
  • Sights Included: No
  • Firearm Fit: AR-15

Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.

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