It is the same O.D and I.D. But that would be a lot of work. First of all you could not cut of the end that goes into the Carrier Key because it has a flare on it to properly seal the gas between the Gas Tube and the inside of the Carrier Key.
If you cut the other end (Front End) off that goes into the front sight housing you would have to plug the end of the tube with something that will withstand the heat. As well as relocate the gas tube roll pin hole in the correct place. Too much work in my opinion. You would be better off to order one or buy one.