The only gas tube i use - V Seven Extreme Environment Gas Tube

If you're looking for the ultimate gas tube that will last or outlast the life of your rifle, look no further. This gas tube is made of the same material most modern suppressors are made of. Suppressors capable of withstanding full-auto fire need inconel in order to last, leave it to V Seven to use that same material to model the toughest gas tube out of. Not only will it survive temperatures that would render your standard gas tubes into a curly noodle of scrap metal, it won't ever rust or corrode. I use these in all of my builds and love the quality of the construction and the fit and finish. When you hold it in your hands you can just feel that this is one bad mama-bama that has no equal. OpticsPlanet was quick to get this shipped out to me as well, so there's that. Is this gas tube worth the premium it commands? If you want the weakest link of your rifle to no longer be a possible liability when you need it most, YES- absolutely!