AR-V BCG cotter pin holding firing pin

Question, i disasembled to clean it and while putting it back i didnt pay attention on the cotter pin. Should the firing pin go down a bit when on bcg then place cotter pin or should it not be pressed down while in bcg and place cotter pin. I assume it needs to be pressed down then cotter pin.

Correct, push it in and the cotter pin goes behind the shoulder to hold it in.

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Makes sense. Thanks!

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