Brownells Ar-15 Gas Tube Rifle Length Black Nitride

The Brownells AR-15 Gas Tube in rifle length is a straightforward, dependable replacement or upgrade component for your AR platform build. This rifle-length gas tube channels propellant gases from your barrel to cycle the bolt carrier group—a critical role in reliable operation. Whether you're assembling a fresh upper receiver, rebuilding after wear, or simply want a quality factory component, a rifle-length gas tube built to exacting standards means one less weak point in your system.

Brownells has machined this gas tube from stainless steel and applied a Black Nitride finish. That finish isn't just for looks. Black Nitride hardens the surface, resists corrosion and wear, and improves fatigue strength—all qualities that matter in a part exposed to high heat and repeated cycling. Whether you shoot suppressed, unsuppressed, in wet conditions, or just want parts that hold up over years of use, the corrosion resistance and durability of a nitrided tube pay dividends.

This is a no-nonsense, Mil-Spec-compatible component for builders and gunsmiths who know exactly what they need. Installation requires a roll pin; note that the pin is not included, so source one separately if you don't already have it on hand. Pair this with a quality gas key and bolt carrier group, and you've got a gas system built to last.

Key Features

• Rifle-length configuration for full-length direct impingement systems
• Stainless steel construction with Black Nitride finish for corrosion and wear resistance
• Enhanced fatigue strength and durability
• Mil-Spec compatible with standard AR-15 uppers and carrier groups

Specifications

Frequently Asked Questions

Will this rifle-length gas tube work with my AR-15 upper?

Yes, if your upper is configured for rifle-length gas delivery. Rifle-length gas tubes are used in full-length direct impingement systems. If you have a pistol, carbine, or mid-length upper, you'll need the corresponding length gas tube instead.

What does the Black Nitride finish do?

Black Nitride improves corrosion resistance, wear resistance, and fatigue strength. It also gives the tube a professional black appearance. For shooters in wet or humid conditions, or those who shoot frequently, the added durability is a practical benefit.

Do I need a roll pin to install this?

Yes. The roll pin secures the gas tube to the barrel. The pin is not included with this tube, so you'll need to source one separately if you don't already have it.