Does anyone know how far forward the fins carry inside the rail? While installing the gas block after the rail is slid on sucks, alignment shouldn't be a problem if the block or shaved FSB is installed using taper pins. If the fins stop at the 7" gas port location, there'd be room to manipulate the rail for a midlength gas setup to get to the pins through the keymod holes. Not ideal or as clean as a NSR or CMR install, but a workable solution.


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