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The gas tube is one of those small parts nobody thinks about until it matters, and this CMMG kit takes the guesswork out of getting your mid-length build running right. It's machined from stainless steel and arrives already bent at the correct place and angle to line up with a mid-length gas block, so you're not fighting alignment during assembly. The kit also comes with the install roll pin, which means you have everything you need to marry the tube to your gas block in one box.
Mid-length gas systems put the gas port roughly nine inches down the barrel, which lands them squarely between carbine and rifle-length timing. That extra dwell compared to a carbine setup usually translates to a softer recoil impulse and easier port life, which is exactly why mid-length has become the go-to for 16-inch builds and a favorite on 14.5-inch setups too. Generally speaking you'll see this tube paired with barrels in the 16 to 18-inch range. Just remember it's cut and bent specifically for mid-length spacing, so it won't play nice with a carbine or rifle-length gas block.
CMMG has been turning out AR parts for a long time and their gas tubes carry a solid reputation among folks who build their own uppers. The stainless construction holds up to the heat and corrosion that comes with venting hot gas shot after shot, and the pre-formed bend saves you the headache of trying to tweak angles yourself. Measuring right around 11 3/4 inches, it hits the standard mid-length dimension so it drops into a proper gas block without drama.
Whether you're finishing a fresh upper or want a backup tucked away in the parts bin, this is a straightforward, no-nonsense piece that does its job and gets out of the way. Pair it with a quality gas block and you're set for smooth, consistent cycling.
Mid-length gas systems are typically matched to barrels in the 16 to 18-inch range, with 16-inch being the most common pairing. This tube is bent specifically for mid-length gas block spacing, so it lines up correctly on those builds. It's a popular upgrade over carbine-length on a 16-inch barrel because it tends to give a softer recoil impulse.
The roll pin is included in the box. You get the CMMG mid-length gas tube along with the 5/64 x 5/16-inch gas tube roll pin needed to secure it in your gas block. That means you have what you need for the install right out of the package.
No. This tube is formed at the correct place and angle for mid-length gas systems only, so it will not fit carbine or rifle-length setups. If you're running a carbine or rifle-length barrel, you'll want the matching tube length for that spacing instead.
Stainless steel stands up well to the heat and corrosion that come with venting hot gas shot after shot, which makes it a reliable choice for a part that lives a hard life inside your upper. CMMG's stainless tubes have earned a good reputation among AR builders for consistent fit and durability. It's a solid pick whether you're building fresh or want a dependable spare.
| UPC | 815835012391 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 55DA1EE |
| Color | GAS TUBE KIT |
| Length | 11 3/4 |
| Model | |
| Product Type | Gas Tube |
| Shipping Weight | 0.0813 |
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