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 | 16" |
Manufacturing Process
| Hammer Forged |
| Twist Rate | 1:7 |
| Gas System | Mid Length |
| Inside Finish | Chrome
|
| Outside Finish | Matte Black Manganese Phosphate |
| Material | Chrome Moly Vanadium |
| Muzzle Thread | 1/2x28 TPI (Threads Per Inch) |
