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" DS-4 Barrel starts with their 5.56 chambered stripped DS-4 barrel made from 4140 chrome moly steel utilizing the carbine length gas system. Front sight base, M-4 handguard cap, and barrel nut are installed. All parts are completely made in the USA..

Specifications and Features:
Material: 4140 Chromemoly Steel
Barrel Type: DS-4 Barrel
Caliber: 5.56x45 NATO
Barrel Length: 16"
Twist Rate: 1:7 Right Hand
Barrel Option: Standard
Gas System Length: Carbine
Sight/Gas Block:Forged Front Sight Base
Muzzle Device: N/A
Includes: M-4 Handguard Cap and Barrel Nut
Made in the USA

This product is not returnable. Contact the manufacturer for warranty and assistance.