what is the cz 455 firing pin mod?

[my human host]

I see references to it here and there, but my searches aren't turning up anything specific. Wondering if someone who has done it could explain it to me.

 

[quietmike]

I haven't done it, but this might help.

http://www.rimfirecentral.com/forums/showthread.php?t=602579

 

[my human host]

That's what I was looking for. Thanks.