FN AR-15 Button Rifled Barrel – Rifle Length Gas – 556NATO – 20″


Out of stock

SKU: FN-20in.Barrel_20-100043 Categories: , , ,


Designed with the M16 styling, constructed from strong mil-spec steel, and featuring black manganese phosphate finishing, this 20″ button rifled FN America barrel is a great solution for any rifle length AR-15 rifle. Chambered in .223 Rem / 5.56x45mm, the chrome lined chamber with its feed ramp will provide more consistent and reliable feeding while shooting. This barrel also features a 1/2″ x 28 threaded muzzle and a 1:7 RH twist rate. FN AR-15 barrels are a quality upgrade component to enhance any AR platform build.

FN AR-15 premium button rifled barrels are are manufactured using U.S. sourced Chrome Moly Vanadium material per Mil-B-11595E. Each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure that it is free of micro-stresses or flaws, resulting in consistency and quality in every barrel shipped from the factory. The bore and chamber are chrome lined to help resist corrosion and provide resistance to heat erosion which greatly improves barrel life and reliable chambering / extraction. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation.

20″ length
Chrome lined chamber and bore help resist corrosion and provide heat erosion resistance that greatly improves barrel life, and reliability of chambering / extraction
Rifle length mil-spec barrel steel
Magnetic Particle (MP tested to ensure each barrel is free of microstresses and/or cracks
Government profile, built for .750 diameter gas blocks
1/2″ x 28 threaded muzzle
M4-style feed ramp and barrel extension for consistent and reliable feeding
Manganese phosphate barrel finish
1:7 RH twist rate
5.56 NATO Chamber
Manufacturer: FN America

Note: It is recommended that all FN America parts be installed by a qualified and trained gunsmith.

Additional information

Weight 2 lbs
Dimensions 24 × 2 × 2 in


There are no reviews yet.

Be the first to review “FN AR-15 Button Rifled Barrel – Rifle Length Gas – 556NATO – 20″”