Originally Posted by totalglitch
hi i am wondering i have a smooth rail and its a little over 7 inchs, my question is if i upgrade to a 9 inch FF pic rail do i have to get a longer gas tube/rod.....
so long as the tube can fit over the gas block, you are good to go. No need to buy another gas tube.
Just do a little research on how the tube you are looking at mounts. If it take a proprietary barrel nut, it may be more headache than its worth to install.
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