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The Yankee Hill Machine pistol-length gas tube is the same piece YHM runs on their own YHM-15 rifles and carbines, so you know it's built to do the job on a real firearm and not just look pretty in a parts bin. It routes hot gas from the gas block back to the bolt carrier group's gas key, which is what cycles the action every time you pull the trigger. This is the pistol-length version, meaning it's cut for the shortest of the four common gas system lengths.
Pistol-length gas tubes are what you want on very short barrels, generally around 10 inches or less, where there simply isn't room for a longer system. They're also a popular pick for 300 Blackout builds, since that short, high-pressure setup helps things cycle reliably even with subsonic loads. The whole point of matching your gas tube to your barrel is smooth, dependable function, and getting the length right is step one.
The black plated finish is more than just a good look. It cuts down on glare and blends in nicely when you're running a vented or slotted handguard where the tube peeks through. Plating also adds a layer of corrosion resistance over a bare steel tube, which is a nice bonus on a part that lives in a hot, dirty environment. If you've spent time getting the rest of your upper dialed in, a plain silver gas tube can stick out. This one disappears.
Installation is straightforward if you've done gas blocks before. The tube slides into the gas block and gets locked in place with the roll pin, which YHM includes right in the package so you're not making a separate trip. You'll want a proper roll pin punch and a vise block to keep everything lined up. Take your time seating the pin and double-check your gas alignment before running the gun.
Pistol-length gas systems are generally used on very short barrels, typically around 10 inches or shorter. They're the go-to for AR pistols and short-barreled builds where there isn't enough room for a carbine or longer system. They're also a common choice for 300 Blackout, where the short, high-pressure setup helps the gun cycle reliably with subsonic ammo.
Yes. YHM includes the gas tube roll pin right in the package, so you have what you need to lock the tube into your gas block. You'll still want a roll pin punch and a way to hold the parts steady during install.
The black plating gives the tube a cleaner, low-glare look that blends in when it shows through a vented handguard. It also adds a layer of corrosion resistance compared to a bare steel tube. It's the same finish YHM uses on their own YHM-15 rifles and carbines.
Yes, this is a direct-fit pistol-length gas tube built to mil-spec dimensions for AR-15 platforms. It slides into a standard pistol-length gas block and mates up with a standard gas key on the bolt carrier group. Just make sure your gas block is also pistol-length so the geometry lines up.
| UPC | 816701019766 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | YHM-BL-04P |
| Color | Black |
| Length | 8.0500 |
| Product Type | Gas Tube |
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