DoubleStar's 16" Bull Barrel Flattop Upper starts with their 5.56 chambered 16" bull barrel made from 416 SS utilizing the CAR length gas system. This match barrel is attached to their flattop upper with their carbine length aluminum free floating handguard. The upper is fully assembled and all parts are completely made in the USA.

Specifcations and Features:
Caliber: 5.56x45mm NATO
Tiwst Rate: 1:8 Right Hand
Barrel Length: 16"
Barrel Type: Bull Barrel
Barrel Material: 416 Stainless Steel
Barrel Features: Free Floating
Gas System: Carbine
Upper Receiver Type: Flattop
Upper Receiver Material: Forged Aircraft 7075 T6 Aluminum
Upper Receiver Features: "T"-Marks, Brass Deflector, Forward Assist, M4 Feedramps
Upper Receiver Coating: Anodized to Mil-Spec
Sight / Gas Block: Picatinny Rail Gas Block
Muzzle Device: N/A
Handguard: National Match Free Float Carbine Handguard
Made in the USA

Fits:

AR-15 lower receivers

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