What size punch to remove that cross pin that holds the firing pin in place. thanks

3/32

Just reminder; the firing pin is under spring pressure. If the spring is intact it will launch when you remove the punch.

Don't punch it all the way out. Just far enough to release pressure on the pin. That will make it easier to tap it back into place afterward. A roll pin punch (rather than a flat punch) will help prevent "boogering" up the pin. To repeat what cjt50 said, it will fly out if you don't put a finger over it.

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Or something like that . . .