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Short-barreled AR builds live and die by their gas system, and the Lantac M-Spec pistol-length gas tube is the kind of part you install once and stop thinking about. It's precision manufactured from 306 stainless steel extruded tube, giving you a clean, consistent gas path for AR-15 platforms running a pistol-length setup. Lantac laser engraves each one and builds them right here in the USA, so you know exactly what you're bolting into your upper.
Pistol-length is the shortest of the four common AR gas systems, and it's what you want when the barrel is too short to support anything longer. These tubes are the go-to for AR pistols and short-barreled builds running roughly 10 inches of barrel or less, where the gas port sits close to the chamber. A handful of 300 Blackout builds also lean on pistol-length gas to stay reliable with subsonic loads. If your barrel is drilled for a pistol-length port, this is the tube that matches it.
The M-Spec name comes from the mil-spec dimensions Lantac holds these to, which is exactly what you want when fitment matters. Stainless steel handles the heat and corrosion that comes with tapping hot gas so near the chamber, and the tight tolerances mean it drops into a standard gas block without any fuss. It's a straightforward, no-drama part that does its job and gets out of the way.
Installation is simple for anyone comfortable working on an AR. The included roll pin secures the tube to your gas block, and from there it's a matter of routing it through the gas block and into the upper. If you're assembling a new short upper or refreshing an older one, this tube covers the fundamentals without cutting corners.
Pistol-length gas is the shortest common AR-15 gas system and is typically found on AR pistols and short builds running barrels around 10 inches or less. It works because the gas port sits close to the chamber, giving the short barrel enough pressure to cycle reliably. Some 300 Blackout builds also use pistol-length gas to run subsonic loads. Match this tube to a barrel that's already drilled for a pistol-length gas port.
It's precision manufactured from 306 stainless steel extruded tube, which stands up to the heat and fouling that comes with a short gas system. Because pistol-length taps hot gas so near the chamber, a durable stainless tube is a smart choice. Lantac holds these to mil-spec dimensions, so fitment stays consistent.
Yes, it ships complete with a gas tube roll pin, so you have what you need to secure it to your gas block. The pin is what locks the tube in place before you route it into the upper receiver. That's one less small part to source separately when you're building.
If you're comfortable working on an AR-15, this is a straightforward swap. You'll pin the tube to your gas block, then route it through the block and into the upper as you assemble the barrel. A steady hand and the right punches make quick work of it, though a first-timer may want a reference guide handy.
| UPC | 640117876329 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 01-MSPEC-GT-PSTL |
| Length | 12.3500 |
| Color | Silver |
| Model | |
| Product Type | Gas Tube |
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