The gen-1 NF has what is essentially a tightening ring at the base of the barrel. That combine with a more powerful spring make for at least a 50% range advantage over other NFs.
They also have no rail.
Which is precisely why my green and grey NF has the internals from my gen-1 NF.
There aren't any clear distinctions between the early batches of Mavericks but I'm certain that the quality of the blue first gen Mavs declined over time. I have several and the later ones I bought feel gummy when you advance them.


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