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CZ PISTOL CLUBS => CZ Polymer Pistols: P10, P-07, P-09 => Topic started by: 2Princetons on May 04, 2024, 09:39:53 AM

Title: P10 Trigger: Overwatch Striker + HBI 3.5# spring?
Post by: 2Princetons on May 04, 2024, 09:39:53 AM

Nice place you got here.  After exhaustive research (since I became a member ~24 hrs ago) it seems to me a good place to start on improving the P10 trigger while avoiding light strikes using cheap ammo is:

- shoot it a bunch
- dry fire it a bunch
- install a ~$43 Overwatch Precision Striker for a ~1/2lb trigger pull weight reduction
- install a HBI 3.5# striker spring for another ~1/2lb reduction

My use is strictly as a range toy.

I don't think there is any downside to the first 2 items. Everything I've read suggests that the P10 triggers improve a bit after a few thousand rounds/dry fires.

I saw a Youtube that suggests the Overwatch striker geometry trades a bit of creep after the wall, rather than the stock crisp break to get the trigger pull weight reduction.  I might be OK with that.

Regarding the lighter HBI striker spring, this blog post by Earlan357 has a surprising finding at the bottom...in his informal sample of 1 testing the HBI 3.5# spring reduced trigger pull by ~9% while increasing strike force by 7%:

http://minivandoorgunner.blogspot.com/2017/09/cz-p-10c-striker-spring-and-hbi-trigger.html

(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDUKpGzszICZryck9ZUp0nzP_o5Js8-XzAEiIqITCN_uZ7MjJE7JIsRmT6gzstNQ72Vg8nMQ3yHU2Uz-64Ulu21xk899b5RekWcZE9HIZNYcUKhr5zVZ9UPuD7EOuqinyyr-jfOBN4PVqV/s400/Spring+weight+energy.jpg)

Couple of questions:

Have any of you tried that combination?

Has earlan357 moved on from the P10's?

Title: Re: P10 Trigger: Overwatch Striker + HBI 3.5# spring?
Post by: 2Princetons on May 09, 2024, 12:15:34 PM

It appears that this striker & spring combo is not all that popular...

If I set my P10F up like that I'll report back.