Theyre right, unless you have problems with the stock powertube, you dont really need one. And if youre using Co2, maybe you should get a metal powertube. Since Co2 is so cold it will wear on your internals, causing the plastic to crack and or shrink, which will lose the whole point of the front bolt (to cover up the end of the powertube when the gas is released, making sure the gas wont go backwards, causing loss of velocity). So a metal powertube will benefit you. I have a DOP Powertube, and it works great. I havent tried the Red Hot Powertube, but Ive heard its quite loud.

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