FN America 20" HF 5.56 1:7 Rifle Gas System Barrel

FN America's AR-15 barrels are hammer forged using the same proprietary high-grade Chrome Moly Venadium steel used in FN's machinegun that are barrels produced to handle the punishment of sustained fully-automatic fire. All of FN's barrels are Magnetic Particle tested to ensure that it is free of micro-stresses or flaws, resulting in consistent quality in every barrel. Both the bore and chamber are chrome lined to help resist corrosion, provide reliable chambering/extraction and extend the life of the barrel. The M4 style feed ramps and barrel extension provide consistent feeding. Finished with a Matte Black Manganese Phosphate finish to resist external corrosion and oxidation.

Caliber	5.56 NATO
Barrel Length	20"
Manufacturing Process	Hammer Forged
Twist Rate	1:7
Gas System	Rifle Length
Inside Finish	Chrome
Outside Finish	Matte Black Manganese Phosphate
Material	Chrome Moly Vanadium
Muzzle Thread	1/2x28 TPI (Threads Per Inch)