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FR8 and 15x1 metric

Posted: Fri Oct 01, 2021 7:55 pm
by Delasangre4231
Hey so I got an FR8 and this is my first 15x1 or metric at all. It has .425 of an inch of threads from muzzle to the "shoulder". How much threads do I need for a flash hider, specifically a Dead Air one for my Sandman. I understand it indexes off the muzzle not the shoulder of the threads on metric.