Finally got my BCM bcg (get them while you can !) for my SBR and was wondering I should install the o-ring for the extractor ? Ive read alot and some say no some say yes but they are mainly running 16in or above barrels. Being mine is 11.5in was wondering if I should just go ahead and install it for a little insurance. Put 200rnds through it tonite and it ran fine(just got the bcg today) Thanks
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