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The gas tube is one of those small parts that quietly does a lot of work. It routes gas bled off at the gas block back to the gas key on your bolt carrier, and if it isn't right, nothing cycles the way it should. Luth-AR builds this one from 304 stainless steel with Army spec heat treatment, which is exactly what you want in a part that lives in a hot, high-pressure environment shot after shot. It measures 11 3/4 inches overall, putting it squarely in mid-length gas system territory.
Mid-length is the sweet spot a lot of builders reach for on 16-inch barrels. Moving the gas port further out from the chamber softens the pressure spike, which tends to smooth out the recoil impulse and ease wear on the internals compared to a carbine-length setup. If your barrel is cut for a mid-length gas system, this is the tube that matches it. Slide it under a low-profile gas block, line it up with the gas key, and you're set.
Stainless is the go-to material here for good reason. It shrugs off the corrosion and carbon buildup that comes with regular shooting, and the heat treatment keeps it from warping or losing shape under sustained fire. Luth-AR is a Minnesota outfit that has built a name on solid, no-nonsense AR components, and this tube reflects that. It's a genuine made-in-America part, not a bargain-bin import, so it holds tolerances where it counts.
This works equally well as a fresh build component or a replacement when an older tube gets tired, dinged, or cross-threaded during a swap. Installation is straightforward for anyone comfortable working on their upper: seat the tube, drive the included roll pin, and confirm alignment before torquing your gas block down. It's a low-cost part that carries a lot of responsibility, and picking a quality one up front saves you the headache of chasing cycling problems later.
This tube is built for mid-length gas systems and measures 11 3/4 inches overall. That length is a common match for 16-inch barrels ported for mid-length gas. Check that your barrel's gas port location is spec'd for mid-length before ordering, since carbine and rifle tubes are not interchangeable.
Yes. Luth-AR includes the correct gas tube roll pin, so you don't have to source that small part separately. That covers the hardware needed to pin the tube into a standard gas block.
It is. The 304 stainless construction and Army spec heat treatment give you a dependable, corrosion-resistant part without a premium price tag. Installation is simple for anyone comfortable working on an upper, and it makes a clean swap when replacing a worn or damaged tube.
Yes, it's designed to run under standard low-profile gas blocks used on most modern AR-15 builds. Just make sure the block is sized for a mid-length setup and that the tube aligns cleanly with the gas key when the bolt carrier is in battery.
| UPC | 859819007683 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BL-04C |
| Model | |
| Product Type | Gas Tube |
| Length | 11 3/4 |
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