Description
The LBE Unlimited Pistol Length Gas Tube is the small part that keeps a short-gas AR-15 running the way it should. It's formed from 304 stainless steel seamless tubing, which is the standard you want to see on a component that spends its life dealing with heat and hot gas. This is the pistol-length profile, meaning it's cut for the shortest of the four common AR gas systems and pairs with a gas block sitting close to the chamber. LBE includes the gas tube roll pin in the package, so you've got what you need to pin it into the block during assembly.
Where the Pistol Length Gas Tube Fits
Pistol-length gas is the go-to for the compact end of the AR family. It typically shows up on AR pistols and short-barreled builds running roughly 10.5 inches or shorter, where a longer gas system simply won't clear the barrel. It's also a popular choice for 300 Blackout setups, since the short dwell and higher port pressure help those rounds cycle reliably, including with subsonic loads. If you're piecing together a truck gun, a home-defense shortie, or a suppressed Blackout host, this is the length that matches.
Why 304 Stainless Holds Up
Gas tubes live in a rough neighborhood. Every round sends hot, dirty gas straight through them, so the material matters. The 304 stainless steel construction gives you solid corrosion resistance and the ability to shrug off repeated heat cycles without complaint. The seamless tubing means there's no welded seam to worry about, just a consistent, uniform bore for gas to travel through on its way to the bolt carrier group.
Installation is straightforward for anyone comfortable working on an AR upper. You slide it into the gas block, line up the roll pin holes, and drive the included pin home. It's the kind of no-drama part that builders and gunsmiths reach for when they want proven fitment without paying for a fancy name on a piece that's essentially hidden under the handguard. Made in the USA and priced to keep your build honest, it does exactly one job and does it well.
Key Specifications
- Manufacturer: LBE Unlimited
- Manufacturer Part Number: ARGTP
- Model: Gas Tube
- UPC: 765857617541
- Product Type: Gas Tube
- Gas System Length: Pistol Length
- Material: 304 Stainless Steel
- Tubing: Seamless
- Finish: Stainless Steel
- Platform: AR-15
- Roll Pin: Included
- Country of Origin: Made in USA
What’s Included
- LBE Unlimited pistol length gas tube
- Gas tube roll pin
Frequently Asked Questions
What barrel length does the pistol length gas tube work with?
Pistol-length gas is built for the shortest AR-15 setups, generally barrels around 10.5 inches or shorter where a longer gas system won't physically fit. It's also a common pick for 300 Blackout builds regardless of barrel length, since the short dwell time helps those rounds cycle reliably. Always match your gas tube length to the gas system your barrel was ported for.
Does this gas tube come with the roll pin?
Yes. LBE Unlimited includes the gas tube roll pin in the package, so you have the hardware needed to pin the tube into your gas block during assembly. You'll still need your own roll pin punch and a way to support the block while you drive it in.
Why choose 304 stainless steel for a gas tube?
Gas tubes deal with hot, dirty gas on every shot, so the material needs to handle heat and resist corrosion. The 304 stainless steel construction holds up to repeated heat cycles and won't rust the way plain steel can. The seamless tubing also means a uniform bore with no welded seam running through it.
Is the LBE pistol length gas tube made in the USA?
Yes, LBE Unlimited manufactures this gas tube in the USA from 304 stainless seamless tubing. It's a straightforward, proven component that builders and gunsmiths use for reliable fitment on AR-15 pistol-length gas systems.




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