The Original CZ Forum
GENERAL => Cajun Gun Works => Topic started by: Oldwolf on October 31, 2016, 09:32:43 AM
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I am considering a 75110 Pro-Package kit for my CZ 75.
However, I would like to keep the OEM hammer spring and firing pin. My understanding is that by doing this this I will increase reliability of successful primer strikes.
What parts do I need?
It would be very handy if there were a table that showed what the more common incremental steps were, and the parts needed to achieve each step, of the levels of customization of the 75.
An example might be this.
For my stainless CZ 75, say I only want a race hammer and short reset trigger. What parts do I need?
Thanks, and I am ready to be educated.
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You can drop to a weaker hammer spring and extended firing pin and still maintain 100% reliability. You don't have to keep the OEM hammer spring.
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Or, if you want the OEM hammer spring, CGW can make you a modified FP. Basically it's the extended FP cut back down to OEM length.
To get the full benefits of the short reset (part of the pro package) you want to get the FP. I believe it's cut a little different to work in conjunction with the CGW FP block lifter.
Give them a call and double check.
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To get the full benefits of the short reset (part of the pro package) you want to get the FP. I believe it's cut a little different to work in conjunction with the CGW FP block lifter.
Okay, that is a good bit of information to know.
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With the extended firing pin I think CGW says the 13lb hammer spring will ignite any primer 100%. Here's my SAO 75 Compact with the short reset system, extended firing pin, 15lb hammer spring, competition hammer and lots of polishing. It never has ignition problems (I've only ran into issues when I was reloading and a part fell out of spec and primers weren't seating all the way.) I've even run 13lb hammer springs with a lighter trigger pull with no problems.
(http://uploads.tapatalk-cdn.com/20161031/1f7f8ef6f5bc4b6e35d932adbcf7ec01.jpg)
Oh and as for a list I'll have a thread in a few days sort of like that, showing what each part does while I upgrade and test my new SP-01 Compact.
Knowing you won't suffer reliability issues, do you still any help with parts combinations?
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I have the p-01 with CGW Defensive Package Decocker installed and have light primer strikes on most Eastern Block ammo (Russian stuff like Bear, Tula ammo). So I wouldn't say it's 100% reliable. This may make me change back to stock. I also noticed that with the extended firing pin, it protrudes enough to poke out of the breach face even with the firing pin block in place ("safe" position) which gives me safety concerns.
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I have the p-01 with CGW Defensive Package Decocker installed and have light primer strikes on most Eastern Block ammo (Russian stuff like Bear, Tula ammo). So I wouldn't say it's 100% reliable. This may make me change back to stock. I also noticed that with the extended firing pin, it protrudes enough to poke out of the breach face even with the firing pin block in place which gives me safety concerns.
Very interesting.
I will wait for CGW to tell us if this is normal, or not.
Thanks for posting this.
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steppingcrane,
You describe 2 inter-related conditions that point to your particular CZ's firing pin block/plunger system being out of time. Incorrect lifter/plunger timing will cause light strikes.
Additionally, damage to the plunger and firing pin shoulder will allow the firing pin to protrude past the breech face. Your CZ needs to be repaired and both issues would be alleviated.
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steppingcrane,
You describe 2 inter-related conditions that point to your particular CZ's firing pin block/plunger system being out of time. Incorrect lifter/plunger timing will cause light strikes.
Additionally, damage to the plunger and firing pin shoulder will allow the firing pin to protrude past the breech face. Your CZ needs to be repaired and both issues would be alleviated.
Thanks for the reply, I'll have this checked. The pistol is new with defensive package installed before firing. No damage was done during install, and this was observed before firing. Just thought the extra length of the firing pin caused it to slightly protrude past the breach face about 1mm when pushed (the plunger stops it going further). When depressing the plunger, the firing pin moves further freely as would during firing.
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It is impossible for our firing pins to protrude .040"/1 mm past the breech face if the firing pin block is operating properly. Besides, you are having light strikes, a classic symptom of an out of time FP block system.
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What would be causing the firing pin block timing delays? Is the gun possibly out of spec? With the the firing pin protrusion, this is when I take a punch or something and push it as far as it can while the plunger is in it's normal position (safe position - *edit), that's when it protrudes a little bit past then stops. I visually inspected the plunger and extended firing pin and there is no damage. The firing pin holding spring pin is in place with it's open end in the 12 o'clock position. This is a new CZ P-01 with 300 rounds through it. Is it possible that Tula/Brown Bear primers can still give this setup light primer strikes due to a harder primer?
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As I understand your issue, you indicate the FP can be pushed .040" through the breech face with the safety plunger in the "safe" position. If so, something is wrong.
I cannot answer the other questions w/o examining your CZ. I suggest you send us an e-mail or call so we can get this resolved quickly and most importantly, safely.
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Email sent, thanks. After taking a closer measure, actual measurement of the firing pin protruding out is about half that, or .020". Sounds like there should be no protrusion, so even that's not normal. It would be my luck to get a slightly out of spec gun or something.
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It would be my luck to get a slightly out of spec gun or something
Mass produced firearms can be like that. That's why we support the CZ platform and back our parts, so rest assured we'll get it working as it should.
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Steppingcrane, How are you defining "the plunger is in it's normal position"?
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Steppingcrane, How are you defining "the plunger is in it's normal position"?
Sorry for the poor terminology. Normal position meaning the "safe" position of the plunger preventing the firing pin from fully striking. This would be before the action of pulling the trigger and the trigger bar activating the plunger lever (in the sear cage) to push the plunger (in the slide) up as the hammer drops allowing the firing pin clearance to strike the primer.
Mass produced firearms can be like that. That's why we support the CZ platform and back our parts, so rest assured we'll get it working as it should.
Good to hear, thank you for looking out for my concerns. Sorry for veering this topic off course some.
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Got my P-01 taken care of by David at Cajun Gun Works and it's test functioning and timing is great! Good turnaround time after sending my gun in. I will take it out to the range this weekend. David is a top notch gunsmith and his customer service is outstanding. He called me up to say he was going to work on my gun and talk it over to assure everything. Two thumbs up, keep on doing the great things you do!
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Great to hear. Glad you've got her up and running. CGW are good people. [emoji106]
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(http://uploads.tapatalk-cdn.com/20161031/1f7f8ef6f5bc4b6e35d932adbcf7ec01.jpg)
Off topic, but Scarlett, can you tell me about those grips?
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Off topic, but Scarlett, can you tell me about those grips?
I haven't seen them on CZ Custom for a while. Here's the full size version that's on my SP-01.
http://czcustom.com/cz-75-full-size-grips-aluminum-black-thin-aggressive-checker.html
I tend to sweat easily so I figured these were just for me. They're really aggressive! They work well but it took some getting used to.
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