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Lantac built the M-SPEC line for folks who want a clean, dependable gas tube without paying a premium for the name on the box. This one is the rifle +1 length version, machined from 306 stainless steel and finished in a bright silver that holds up well against corrosion. It carries gas from the gas block back to the bolt carrier group, and on a direct impingement AR that little tube does a lot of quiet, unglamorous work every time you pull the trigger.
The rifle +1 length is meant for longer barrel setups, generally 20 inches and up, where the gas port sits farther down the barrel. That extra distance gives the gas more time to settle before it reaches the bolt, which usually means a smoother cycle and less felt recoil compared to shorter carbine and pistol systems. The "+1" simply refers to the extended length, so make sure your barrel's gas port location and handguard are set up for a rifle-length tube before ordering. If your barrel was cut for rifle-length gas, this is the size you want.
Gas tubes are one of those parts where fit and material quality matter more than flash. The 306 stainless construction resists heat and corrosion, and the extruded build keeps the inner diameter consistent so gas flows the way it should. Lantac laser engraves each tube and manufactures them in the USA, and they're cut to hold true mil-spec dimensions, so it drops into a standard gas block and lines up through the receiver without a fight.
One detail worth calling out is that it comes complete with the gas tube roll pin, which is easy to lose and annoying to source separately. That means everything you need to pin it into your gas block is in the bag. Whether you're finishing a fresh long-range build or replacing a tired tube on an older upper, this is a solid, no-drama choice.
The rifle +1 length is designed for longer barrels, typically 20 inches and up, where the gas port sits farther down the barrel. Before ordering, confirm your barrel was drilled for a rifle-length gas system and that your handguard is long enough to cover the tube. If your build is set up for carbine or mid-length gas, you'll want a different size.
Yes, it ships complete with the gas tube roll pin. That little pin is easy to misplace and a hassle to track down on its own, so having it included means you can pin the tube into your gas block right away.
The "+1" refers to the slightly extended rifle length of the tube. It's meant to match barrels and gas blocks configured for that specific spacing, so it's worth matching your parts before installing.
It's a solid choice. Stainless holds up well against the heat and corrosion a gas tube deals with every time you fire, and the extruded construction keeps the inner diameter consistent for reliable gas flow. Lantac machines these to mil-spec dimensions so they fit standard gas blocks and receivers without modification.
| UPC | 640117876343 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 01-MSPEC-GT-RIF+1 |
| Length | 16.8000 |
| Product Type | Gas Tube |
| Color | Silver |
| Model |
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