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The gas tube is one of those small parts that has a big say in whether your AR runs right, and CMMG built this one for pistol-length setups where every bit of dwell time matters. It's turned from stainless steel and measures right around 6 3/4 inches, which is the standard span for a pistol gas system. If you're piecing together a short-barreled build or bringing an older PDW back to life, this is the piece that carries gas from the block back to the bolt carrier so the whole thing cycles the way it should.
Pistol-length gas systems live on the shortest AR-15 barrels, usually 10 inches or under. That short distance from chamber to gas port means higher pressure and a quicker cycle, so a properly made tube matters here more than most people give it credit for. This one is dimensioned for that pistol/PDW footprint, so it won't play nice with carbine, mid, or rifle length barrels. Match the tube to your gas port location and you're set.
Stainless steel holds up well against the heat and fouling that come with the fast, hot cycling of a short gas system. It resists corrosion and keeps its shape under repeated heat cycles, which is exactly what you want out of a part buried under the handguard where you don't see it working. CMMG has a long track record building AR-15 rifles and components, so you're getting a tube from a company that knows the platform inside and out.
This is a kit rather than a bare tube, so the installation roll pin comes in the package. That saves you a trip back to the parts bin mid-build. Whether you're finishing a fresh upper or swapping out a tired tube during a rehab, you've got the routing component and the pin to lock it in place.
Pistol-length gas systems are meant for the shortest AR-15 barrels, generally 10 inches or under. The gas port on your barrel is what determines the system length, so measure or check your barrel's specs before ordering. This tube is dimensioned for the pistol/PDW gas port location and won't fit carbine, mid, or rifle length barrels.
Yes. The installation roll pin is included in the kit, so you have the tube and the pin needed to lock it into the gas block in one package. That's one less small part to track down during your build or repair.
It measures right around 6 3/4 inches, which is the standard length for a pistol-length AR-15 gas system. If your existing tube measures close to that, you're in the right ballpark for a direct replacement.
Stainless steel stands up well to the heat and fouling that come with the fast, high-pressure cycling of a short gas system. It resists corrosion and holds its shape through repeated heat cycles, which makes it a solid pick for a part that works hard and stays hidden under the handguard.
| UPC | 815835012377 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 55DA15F |
| Color | GAS TUBE KIT |
| Length | 6 3/4 |
| Model | |
| Product Type | Gas Tube |
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