I just installed one of those for a guy today on a lightweight barrel. His is only the 2nd I have done after my own. I think they're a great, inexpensive and VERY VERY light alternative to most of the others. The guy who makes them is a carbon fiber guy before a gun accessory manufacturer, so he doenst always have them in stock, but give them a try.
PRI makes another one which is probably a much stronger tube. You can get it with either a steel or aluminum barrel but. Steel is stronger but I would imagine aluminum is probably strong enough for most. And its a lot lighter. the PRI tube with either nut is not as light as the HiPerform, and it is a lot more money.