CZ Shadow 2 Half Cock in rapid fire or racked vigirously.

[EZ128]

Yes that is a rolled edge. Already put in a new sear, along with the original ( almost unused) factory S2 hammer and factory sear spring. Shot couple of hundred rounds last night and al is working fine now! Will report back if anything interesting happens!

Thank you all for your advice!

[Stanseven]

Don't know much about guns but on car engines, if you replace parts of a worn assembly with a new part it will wear both parts (old and new) much faster than if you'd installed two new parts to work with each other.

I'd vote replacing both the hammer and sear (and the sear spring, even if you buy/install a new lighter than stock spring.)

Good luck with it.

Even more pronounced with bicycles.  People replace worn out chains because shifting isn’t smooth.  But unless they look at and replace a worn rear gear cluster, the problem doesn’t go away and can even be worse.

[SI VIS PACEM PARRABELLUM]

Don't know much about guns but on car engines, if you replace parts of a worn assembly with a new part it will wear both parts (old and new) much faster than if you'd installed two new parts to work with each other.

I'd vote replacing both the hammer and sear (and the sear spring, even if you buy/install a new lighter than stock spring.)

Good luck with it.

Even more pronounced with bicycles.  People replace worn out chains because shifting isn’t smooth.  But unless they look at and replace a worn rear gear cluster, the problem doesn’t go away and can even be worse.

This is apples and oranges. The simple fact is parts that wear together need to be replaced together.

[tdogg]

But did you adjust your overtravel setscrew?  It takes two seconds to check and a few minutes to adjust.

Cheers,
Toby

[EZ128]

Yes I did: it was fine. Trigger moves freely when fully depressed.

[tdogg]

You want to look and feel if the hammer contacts the sear when the trigger is fully depressed.  Rock the hammer back and forth (fully) while pulling the trigger fully.  It doesn't take much for it to touch.  Something isn't right with how your sear looked.

Cheers,
Toby

[George16]

This is a CZ brand ...I did have lots of more dry fire with it using CoolFire ( gas-powered slide movement) tho.

On another note: I wonder if anyone tried to revive an old hammer by sharpening the edges??? Probably not too wise to do so?

You can put an Oring during dry fire to prevent that from happening. That’s what I used for dry firing.

Oring part number
AS568-106 RR806


https://mykin.com/as568-106-silicone-70.html