DoubleStar uses high quality American made parts to ensure performance in your AR15. Why Choose DoubleStar Parts instead of the Other Guys; DoubleStar uses only the best parts to make their lower parts. Lesser Parts use metal injected molded or improper steel to cut costs. The lesser part will wear at an extremely high rate and need replacing sooner. DoubleStar parts are made to last for the lifetime of the weapon.
Their 16" Nitrided Fluted Bull Barrel starts with their 5.56 chambered stripped bull barrel made from 416 SS utilizing the Carbine length gas system. This fluted match barrel has the barrel extension installed, pinned, and gas port drilled. All parts are completely made in the USA..

Specifications and Features:
Material: 416 Stanless Steel
Barrel Type: Bull Barrel
Caliber: 5.56x45 NATO
Barrel Length: 16"
Twist Rate: 1:8 Right Hand
Barrel Option: Nitrided
Gas System Length: Carbine
Made in the USA