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The gas tube is one of those small parts that quietly does a huge job. It carries hot gas from the gas block back to the bolt carrier group so your AR cycles round after round. This LBE Unlimited version is cut for rifle-length gas systems, made from 304 stainless seamless tubing, and it drops in on classic full-size builds where the longer gas path is doing the work.
Rifle-length is the longest of the standard AR gas systems, measuring right around 15.125 inches. That puts it on 20-inch barrels and the occasional 18-inch setup, including A2-style rifles and other full-length builds. The extra length gives you a longer dwell time, which generally means softer recoil and less violent cycling on the bolt carrier group. If you're chasing a smooth-shooting rifle or restoring a classic configuration, this is the tube that belongs in it. Just make sure your barrel is actually ported for rifle-length before you order, since matching the tube to the gas port location is what keeps everything running right.
Gas tubes live in a rough neighborhood. They deal with heat, carbon fouling, and moisture every time you shoot, so the 304 stainless steel here isn't just a spec sheet flex. It resists corrosion and holds up to the constant heat cycling without warping or scaling, which helps the tube keep its internal bore consistent over thousands of rounds. Gas tubes rarely wear out, but when one gets bent, clogged, or damaged, stainless is the material you want going back in.
LBE Unlimited includes the gas tube roll pin, so you've got what you need to pin the tube into your gas block. This is a straightforward job for anyone comfortable with a punch and a vise block, and it's a common step whether you're assembling an upper from scratch or swapping a tired tube during a rebuild. It's a no-drama part from a brand that's become a go-to for solid, made-in-USA AR components at a builder-friendly price.
Rifle-length gas systems are built for longer barrels, most commonly 20 inches, with some 18-inch builds using them as well. The tube measures roughly 15.125 inches, which is the longest of the standard AR gas systems. Always confirm your barrel is ported for rifle-length before installing, since the gas port location on the barrel is what dictates which tube you need.
Yes. Every one of these ships with the gas tube roll pin, so you have the hardware to pin the tube into your gas block. You'll still want a proper roll pin punch and a supported surface to drive it in cleanly.
304 stainless resists corrosion and stands up to the constant heat and carbon fouling inside an AR gas system. That helps the tube keep its bore consistent and its shape true over a long service life. It's a proven material for a part that has to take heat cycle after heat cycle.
No, gas tube length has to match your barrel's gas system. Putting a rifle-length tube on a shorter carbine or mid-length barrel will cause cycling problems because the tube won't line up with the gas port and receiver correctly. Match the tube to the gas system your barrel was drilled for and you'll be good.
| UPC | 765857617534 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARGTR |
| Model | |
| Product Type | Gas Tube |
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