The KAK Industry carbine-length gas tube (brand part no. AR15-UP-171) carries propellant gas from the barrel port back to the bolt carrier group, the essential link that cycles a direct-impingement AR-15’s action shot after shot. KAK Industry was founded in 2011 by Kurt Kosman specifically to close a gap in the market for quality, American-made AR-15 components at affordable, sustainable prices, and this gas tube reflects that same mission. It’s built to standard mil-spec carbine-length dimensions, securing in the gas block with a common roll pin just like a factory tube. Builders assembling a carbine-length upper from scratch, or replacing a bent or worn factory tube, both need this exact part.

Key Specifications

• Sized for a carbine-length gas system.
• Channels propellant gas from the barrel port back to the bolt carrier group to cycle the action.
• Secures in the gas block with a standard roll pin.
• Manufactured to mil-spec carbine-length dimensions.
• Made in the USA by KAK Industry.
• Positioned as an affordable, quality alternative to OEM gas tubes.

Frequently Asked Questions

Will this fit a rifle-length gas system? No, this tube is sized specifically for a carbine-length gas system.

Is this made in the USA? Yes, KAK Industry manufactures this gas tube domestically.

What holds the tube in the gas block? A standard roll pin, the same as a factory gas tube.

Buy the KAK Carbine Length Gas Tube

Keep your carbine-length AR-15 cycling reliably. Order the KAK Industry gas tube from our AR15 parts lineup, and our Lubbock, Texas team can help confirm compatibility before it ships.