The tube is solid enought and seems well made. However there is a MAJOR problem with the barrel nut. It is too small in diameter. The standard AR wrench will NOT fit it. Although the nut fits over the barrel and can be screwed onto the upper receiver, the holes around the outside radius of the nut are not spaced far enough apart. Thus no standard AR barrel wrench will work on it. I had to fabricate a custom barrel wrench out of half inch steel and #10 cap screws to torque the barrel nut on. And then the gas tube would not fit thru into the upper receiver, because the holes once again are not far enough away from the center. So when the gas tube is inserted through the hole in the barrel nut, it does not align with the hole in the upper receiver, preventing the gas tube from entering the upper receiver. This is a Chinese product, but I'm not sure what specs they were using when they made it. Not the correct specs for a US AR, that's for sure. Avoid this forearm unless you want headaches and hours of work that shouldn't be necessary.
The installation was pretty simple. Some blue lock tight was used to help secure the tube and locking ring to the barrel nut, as was a standard armorers wrench and torque wrench. I used this on a 300 blackout build for hunting. The fact that it was smooth other than the knurled section was a big selling point, less things to reach out and grab everything in the neighborhood while your hunting. The barrel nut is aluminum so I reduced the torque foot poundage to 28.5.