Daniel Defense MID-Length Gas Tube Assembly

Product Description

The Daniel Defense mid-length gas tube is a factory replacement or upgrade component for AR-15 upper receivers using a mid-length gas system. This assembly is made in the USA and designed for precise fit and reliable cycling.

A gas tube carries propellant gas from the gas block back to the bolt carrier group, cycling the action. Mid-length systems offer smoother recoil and better dwell time than carbine-length setups, making them a popular choice for 16-inch barrels.

This Daniel Defense gas tube is built to the same specification as the tubes found on factory Daniel Defense rifles. It works with any AR-15 upper receiver configured for a mid-length gas system.

Key Facts

• Model: Daniel Defense Mid-Length Gas Tube Assembly
• SKU: DD-04-013-18034
• Gas System Length: Mid-Length
• Roll Pin: Stainless Steel
• Manufacture: Made in the USA

Mid-Length Gas Tube Fit and Function

A mid-length gas tube measures longer than a carbine tube and shorter than a rifle-length tube. It pairs with a mid-length gas block positioned farther forward on the barrel, typically around nine inches from the upper receiver.

The tube must align precisely with the gas port in the barrel and the gas key on the bolt carrier. Proper alignment ensures consistent cycling and prevents short-stroking or excessive gas bleed. If you are building or repairing an upper receiver, verify your gas block position before installing the tube.

This tube uses a stainless steel roll pin to secure it to the gas block. Stainless resists corrosion better than standard pins and maintains tension over repeated heating cycles.

Why Choose a Daniel Defense Gas Tube

Daniel Defense manufactures gas tubes to the same tolerances as the components in their complete rifles. The tube diameter, wall thickness, and bend radius are held to tight specifications, ensuring the tube seats fully in the gas block and clears the handguard without binding.

Gas tubes are a high-wear item. Carbon fouling, heat stress, and impact can bend or clog a tube over time. Replacing a damaged tube restores function without replacing the entire upper assembly. Many builders also prefer factory-spec tubes when assembling a custom upper to avoid fitment issues with off-spec components.

If you are sourcing barrels and gas system parts for a new build, confirm your gas block position and barrel length match the mid-length gas system before ordering.

Ordering from Western Sport

Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: Will this Daniel Defense gas tube fit my AR-15 upper receiver?

A: This tube fits any AR-15 upper receiver configured for a mid-length gas system. The gas block must be positioned at the mid-length location on your barrel, and the barrel must have a gas port drilled at that position. Send us a message to confirm compatibility with your specific build.

Q: What is the difference between mid-length and carbine-length gas tubes?

A: A mid-length gas tube is longer and pairs with a gas block positioned farther forward on the barrel, typically on 16-inch barrels. Mid-length systems allow more dwell time and smoother cycling compared to carbine-length systems. Carbine tubes are shorter and position the gas block closer to the receiver, common on 14.5-inch and shorter barrels.

Q: Can I use this gas tube with any gas block?

A: Yes, this Daniel Defense mid-length gas tube works with any mid-length gas block that accepts a standard AR-15 gas tube diameter. The tube secures to the block with the stainless steel roll pin provided. Ensure your gas block is aligned with the barrel gas port before pinning the tube.

Q: How do I know if my gas tube needs replacement?

A: Replace your gas tube if it is visibly bent, cracked, or crushed, or if carbon buildup cannot be cleared. A damaged tube causes cycling failures, short-stroking, or failure to eject. If your rifle shows these symptoms and cleaning the gas key and bolt carrier does not resolve them, inspect the gas tube for damage.

Q: Does this Daniel Defense gas tube come with a warranty?

A: Send us a message to confirm warranty terms for this gas tube assembly. Western Sport can provide manufacturer warranty information and handle claims for products purchased through the shop.

Additional information