Just put one in my J. Simple. Only question is since I left the flag in, which way should the notch on the inside face? Forward or to the rear?

As a side note to others doing it, if the trigger feels frozen when you try to pull it during disassembly, make sure it is fully pushed in to the frame. Mine tends to try to slip out and I have to push it back in to unfreeze the trigger.

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John