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1911Luvr
09-17-2012, 4:24 PM
I was unable to find any threads on how to convert a CZ-75B to single action, so has anyone done it or know how? I would like to add the flat trigger from the CZ-75SA Tactical Sport too. What parts do I need to replace, omit, etc.?

The curved trigger kills my finger after a couple mags, and I am used to carry cocked and locked like my 1911s so I don't need double action. Also, once it is changed to single action, is it still approved for IPSC production class?

Thanks!

zfields
09-17-2012, 4:25 PM
Pretty easy to do.

Swap the hammer, remove disconnector, replace trigger.

Not sure abotu IPSC, but USPSA and IDPA it would not be legal for production/SSP

dwtt
09-17-2012, 4:38 PM
For IPSC, the gun would become a Standard Pistol handgun and you'll end up competing against major caliber pistols. In IPSC, 15 rounds are allowed in the Standard pistol division. In the US, the gun would become a Limited gun and it will also be competing against major calibers.

Lead Waster
09-17-2012, 5:00 PM
LOL, A fellow USPSA shooter is actually going to put a shadow slide and convert my 75SA to double action with the CZ85 combat trigger, so I can use it as a backup to my SP-01 for matches...not that I think I'd ever really need a backup gun for the intermittent local club matches that I shoot. But it would also give me an alternate gun just for fun. And putting in the flat trigger and removing the disconnector will put it back into SA mode. Actually pretty pointless except for the gun of experimentation.


You can shoot the SA gun in Limited 10. If you have higher cap magazines, it might make sense to shoot it in Limited so that you can at least get the advantage of the higher capacity vs the major scoring. If you go L-10 then it's just your minor+speed vs their major scoring. (NOTE: I just saw a scoresheet where the L-10 winner was shooting a Glock 34 (9mm) and he beat out the guys shooting major, based on both speed and accuracy, so it IS a viable choice)

JeremyS
09-17-2012, 5:00 PM
Not difficult. My SP-01 is now single action only with the dual adjustable (set screw adjusts for pre- and over-travel) trigger:

https://lh3.googleusercontent.com/-fW17AHEv0gQ/UFFjUkBnfdI/AAAAAAAACyo/pCxe6486swM/s800/20120911_203540.jpg


+1 to what zfields said, although I'm not even sure you have to replace the hammer. Yeah, I could look it up but I'm too lazy. Remove disconnector for sure, and put in new trigger for sure, not sure if hammer is a necessity.

Also, I would highly recommend a new floating trigger pin from Cajun Gun Works. Often the factory ones are not reusable due to being "retained" by smushing one end. http://www.cajungunworks.com/spring_kits.html

David at CGW can also set you up with all of the other parts you might need to switch to Single Action and have an absolutely amazing trigger, including the trigger itself and maybe one of his race hammers. My gun, pictured above, actually just shipped to him today to have him put a race hammer in it and just generally tune this thing so it's as good as a CZ trigger can possibly be. Meaning: absolute minimum of pre- and over-travel while still functioning reliably and the shortest possible pull and reset distances with a crisp, clean break. It is my preference to keep the trigger a little heavier than some might for target/competition shooting, and he's aiming for 3.5 lbs or maybe just a teeny tiny bit over that. The thing is going to be AWESOME when it comes back and I expect it to be as good as my Springfield Professional, which is one of the best anywhere hands down. It's already close, and after David's done with it I think anybody who spent $3,000 or more for their 1911 is going to be pissed when they feel how amazing this thing is :)

zfields
09-17-2012, 5:02 PM
Not difficult. My SP-01 is now single action only with the dual adjustable (set screw adjusts for pre- and over-travel) trigger:


+1 to what zfields said, although I'm not even sure you have to replace the hammer. Yeah, I could look it up but I'm too lazy. Remove disconnector for sure, and put in new trigger for sure, not sure if hammer is a necessity.

Also, I would highly recommend a new floating trigger pin from Cajun Gun Works. Often the factory ones are not reusable due to being "retained" by smushing one end. http://www.cajungunworks.com/spring_kits.html

David at CGW can also set you up with all of the other parts you might need to switch to Single Action and have an absolutely amazing trigger, including the trigger itself and maybe one of his race hammers. My gun, pictured above, actually just shipped to him today to have him put a race hammer in it and just generally tune this thing so it's as good as a CZ trigger can possibly be. Meaning: absolute minimum of pre- and over-travel while still functioning reliably and the shortest possible pull and reset distances with a crisp, clean break. It is my preference to keep the trigger a little heavier than some might for target/competition shooting, and he's aiming for 3.5 lbs or maybe just a teeny tiny bit over that. The thing is going to be AWESOME when it comes back and I expect it to be as good as my Springfield Professional, which is one of the best anywhere hands down. It's already close, and after David's done with it I think anybody who spent $3,000 or more for their 1911 is going to be pissed when they feel how amazing this thing is :)

Probally don't need to swap the hammer, but if you're going to go SAO, might as well make it a nice trigger and kill the camming!

JeremyS
09-17-2012, 5:03 PM
BTW it's a common modification to reduce the curvature of the DA/SA trigger that's in your gun. People will heat it up, put it on a hard, flat surface (anvil top of a bench vice being basically ideal), then tap it with a hammer to flatten out the curve. You can get away with quite a bit of this before the trigger becomes too long for the trigger guard, and it makes it much more comfortable for a lot of people -- I'm confident you'd be in that "a lot of people" group considering what you said in the original post.

1911Luvr
09-18-2012, 3:42 AM
Not difficult. My SP-01 is now single action only with the dual adjustable (set screw adjusts for pre- and over-travel) trigger:

https://lh3.googleusercontent.com/-fW17AHEv0gQ/UFFjUkBnfdI/AAAAAAAACyo/pCxe6486swM/s800/20120911_203540.jpg


+1 to what zfields said, although I'm not even sure you have to replace the hammer. Yeah, I could look it up but I'm too lazy. Remove disconnector for sure, and put in new trigger for sure, not sure if hammer is a necessity.

Also, I would highly recommend a new floating trigger pin from Cajun Gun Works. Often the factory ones are not reusable due to being "retained" by smushing one end. http://www.cajungunworks.com/spring_kits.html

David at CGW can also set you up with all of the other parts you might need to switch to Single Action and have an absolutely amazing trigger, including the trigger itself and maybe one of his race hammers. My gun, pictured above, actually just shipped to him today to have him put a race hammer in it and just generally tune this thing so it's as good as a CZ trigger can possibly be. Meaning: absolute minimum of pre- and over-travel while still functioning reliably and the shortest possible pull and reset distances with a crisp, clean break. It is my preference to keep the trigger a little heavier than some might for target/competition shooting, and he's aiming for 3.5 lbs or maybe just a teeny tiny bit over that. The thing is going to be AWESOME when it comes back and I expect it to be as good as my Springfield Professional, which is one of the best anywhere hands down. It's already close, and after David's done with it I think anybody who spent $3,000 or more for their 1911 is going to be pissed when they feel how amazing this thing is :)

I will give CGW a look. I'm curious to feel how crisp and light they can make a CZ trigger, but I have a couple $3000+ 1911 customs and I am highly doubtful the trigger feel of any other non-1911 pistol could be better. I try to keep an open mind, but I have never felt anything as good as a properly tuned 1911 trigger.

BTW, that is a very good looking pistol!

JeremyS
09-18-2012, 9:12 AM
I don't know about better -- it's so subjective and all -- but it can be pretty freaking amazing. I don't think you can get the total travel to be as short as a 1911 due to mechanical differences, especially reset distance, but it's not too far off and I personally don't find that as important as an awesomely crisp break, which you will get. Total movement from all the way forward to pinned at the back is super short, but not as short as you can get a 1911. I think the reset on the CZ is typically louder and more tactile though. I'm not sure if it's distance to the trigger or angle to the trigger or just the amount of rounds I've put through it compared to my 1911's or what, but the CZ trigger is more comfortable and natural for me.

If you want another $3,000+ custom 1911, I'm selling my Professional :p

J.D.Allen
09-18-2012, 9:51 AM
I will give CGW a look. I'm curious to feel how crisp and light they can make a CZ trigger, but I have a couple $3000+ 1911 customs and I am highly doubtful the trigger feel of any other non-1911 pistol could be better. I try to keep an open mind, but I have never felt anything as good as a properly tuned 1911 trigger.

BTW, that is a very good looking pistol!

I don't have my CZ set up that way, but I got a chance to shoot a buddy's 85B combat that had been tuned, and oh good Lord that trigger was sweet. You might be surprised.

elsolo
09-18-2012, 9:57 AM
If you convert to SA ( I have done several), there are a few other gains you can make.

Trim, modify or eliminate the firing pin blocker actuation lever, this destroys the ability to have a short trigger rest.

Stone the triggerbow sides and other internal trigger parts since you have them removed.

You can swap out hammers, or cut the hooks on the hammer.

Swapping parts is half of it, that gives you the ability to make adjustments which is where most of the gains are.

schmeky
09-19-2012, 3:28 PM
I try to keep an open mind, but I have never felt anything as good as a properly tuned 1911 trigger.

Yes sir, a CZ most definitely can. And I have been working on 1911's for 30+ years. As a matter of fact, I have a drop-in hammer kit that will probably amaze you.

asgalindez
09-19-2012, 3:36 PM
Sent one of my 75B SAs to CZCustoms. Competition hammer, SAO straight trigger, Remove FPB, adjust pre- and over-travel equaled a 2.5lb trigger pull that would rival a custom tuned 1911. Anyone that's tried it out has been thoroughly impressed.

I've heard the CGW stuff is equally impressive.

SDRider858
09-19-2012, 4:22 PM
Yes sir, a CZ most definitely can. And I have been working on 1911's for 30+ years. As a matter of fact, I have a drop-in hammer kit that will probably amaze you.

Hey Schmeky! Glad to see you over here on calguns!

I still would like to send my 97b over to you for some treatment...I love the shortened frame look and would also like you to do a few other things. I shot you a PM a few days ago on the CZ forum, please respond when you have a chance. Thanks!

schmeky
09-19-2012, 5:31 PM
SDRider858,

Man I love those 97's. Be glad to help you out. I like it when customers call me and say, "Hey, you sent me the wrong gun". True story, customer was surprised with his "new" CZ :p

1911Luvr
09-20-2012, 12:13 AM
Yes sir, a CZ most definitely can. And I have been working on 1911's for 30+ years. As a matter of fact, I have a drop-in hammer kit that will probably amaze you.

Mine already has the competition hammer added which was installed before I ever shot it, so I'm not sure how much better it became but it's not where I'd like it yet. I'm guessing you are a CZ specialist? If so, please PM me- I'd really like to hand it off and have it expertly tuned!

schmeky
09-20-2012, 6:39 AM
1911Luvr,

In a nutshell, the excellent CZ Custom Comp hammer has 90 degree hammer hooks. The sear angle is 72 degrees. This is a relatively incongruent match. This is why I designed my new hammer with a matching 72 angle.

I can definitely improve the trigger pull on your CZ if it has a comp hammer. All I will need is your hammer assembly. I'll send you a PM.

daybreak
09-20-2012, 7:59 AM
I have an SP01 with a single action only conversion with a CGW race hammer, done my schmecky himself. It is freaking sweet. Slightly nicer cleaner break than my Shadow SAO.

I won't go back to DA/SA. I don't see the point.

zfields
09-20-2012, 8:34 AM
I won't go back to DA/SA. I don't see the point.

Uspsa production :)


Sent from my fingers, to your face.

daybreak
09-20-2012, 9:10 AM
actually I bought a 75 shadow da/sa with the intention to shoot production class, but now I'm not sure I'm going to. I love SA so much more.

elsolo
09-20-2012, 10:21 AM
I shoot my SA only as limited minor as often as I shoot DA/SA in production.
Just depends on how many reloads I feel like doing that day.
Unless you are really worried about within-division ranking rather than overall placement.

ruchik
09-21-2012, 10:33 PM
I'm a little late to the party, but here's a review I did of Cajun Gun Work's job when I had my CZ converted to SAO.

So here's some backstory. I initially bought my CZ 75B Compact intending to turn it into my ultimate steel-framed SAO blaster. The only thing I really disliked about the gun was its long SA mode takeup. Because of the nature of DA/SA hammer and trigger mechanisms, triggers will have a lot of free play and slack where the trigger does absolutely nothing in SA mode. So begins my saga.

I first converted the gun to SAO, by removing the disconnector and installing a SAO trigger. I wanted to remove all the slack, and move the static trigger position in SA mode further back to reduce trigger reach. Unfortunately, and much to my utter disappointment, it had the exact opposite effect. The break point was moved further forward, increasing reach instead. Back to the stock trigger.

Next I put slim aluminum grips from CZCustom on my gun. That helped a lot, but the free play in the trigger bugged the crap out of me. I began to search online, trying to see if there was some way I could fix this. The only way to shorten the trigger reach and move the static trigger position back is to remove the firing pin block. There was simply no way I could get what I wanted. As I will be using this gun for self and home defense, that was the last modification I wanted to perform on my CZ. I sadly started to consider maybe this wasn't "the one", and started to think about selling it.

Then, with some assistance and suggestions from fellow Calgunners, I was told to contact David Milam of Cajun Gun Works to see if he could do anything. He is THE MAN when it comes to CZ trigger work. Some of you may be familiar with his drop in hammer kits and Extreme Reach Reduction Kits for the CZ product line. I contacted Mr. Milam with my questions, and quite honestly I expected nothing to come of it, as every answer I always got was "It's not possible." However, Mr. Milam asked me to give him a day or two to see if he could work something out.

True to his word, he got back to me two days later. Much to my astonishment, Mr. Milam told me that he had actually figured it out. He said it required some fundamental engineering changes to the firing mechanism and parts, and gave me a list of modifications I needed to make. Note, he did not say send me the gun, buy my parts, or anything like that; he did the research and test fitting on his own frame and time, then gave me the specs for free. Since 1) the modifications were way over my head and 2) I felt such honesty and "customer" service (I wasn't even a paying customer yet!) deserved my business, I sent the gun his way. I just got it back, and was lost for words as Mr. Milam's work completely exceeded my wildest expectations.

Here is the trigger in its stock configuration, in SA:
http://img.photobucket.com/albums/v422/nickparkus/2011-12-07075809.jpg

And here it is after he did his work:
http://img.photobucket.com/albums/v422/nickparkus/2011-12-28042907.jpg
http://img.photobucket.com/albums/v422/nickparkus/2011-12-28043309.jpg


(For those who noticed/wondering, that's not the stock slide. It's a slide from a full size CZ SAO that I bought off another Calgunner, JeremyS, who took a huge risk by buying a brand new, whole gun, taking me on nothing but my word that I'd buy the slide off him. Thanks again!)

Now here's the kicker: the firing pin block is intact. This shouldn't work. Normally, in order to get that trigger position, you must remove the firing pin block. Mr. Milam reworked the trigger and FPB in such a way to make what should be impossible, possible. He also reprofiled my stock trigger to make it thinner front to back, further reducing trigger reach. Here's the specs:

Stock trigger thickness - 2.5mm
Stock SA trigger position - 12.0mm
Finger reach - 14.5mm

Thinned trigger - 1.5mm
Modified trigger position - 7.5mm
Finger reach - 9.0mm

As you can see, the trigger reach has now been reduced by a whopping 38%.

I cannot say enough good things about Mr. Milam. His customer service is outstanding, to put it mildly. He responded to all my emails, every single one, within hours of me sending it, despite being in Louisiana. He never once pushed his products, only notifying me of different possible options that he offered in case I wanted it (and I did, got a reduced power FPB spring). Mr. Milam kept me in the loop and contacted me with updates when he received my gun, when he started work on it, during working on it, when he sent it out to me, and when tracking showed it delivered. But most impressive of all, he took on a challenge and accomplished the first CZ modification of its kind (to my knowledge) in just six days. That was INCLUDING the weekend. He's on top his shizzle, all right.

If you've got a CZ and want to make a modification that everyone else is telling you won't work, contact Mr. David Milam of Cajun Gun Works. He just might make it a reality.

daybreak
09-22-2012, 2:12 AM
I live a few minutes away from CGW and have met David and been to CGW a few times. everything you hear about him is true. He is an amazing person. Doesn't push his products on you, and gives you straightforward honest advice. His products are sweet.

elsolo
09-22-2012, 8:34 AM
But most impressive of all, he took on a challenge and accomplished the first CZ modification of its kind (to my knowledge) in just six days.

That's great.
He is certainly not the first person to move the trigger break point rearward on a CZ. I experimented with it so I had a better trigger reach for the DA shot, so used to SA trigger position, the long DA reach messed with me for a couple years when I switched to production.

JeremyS
09-22-2012, 2:31 PM
http://img.photobucket.com/albums/v422/nickparkus/2011-12-28043309.jpg


(For those who noticed/wondering, that's not the stock slide. It's a slide from a full size CZ SAO that I bought off another Calgunner, JeremyS, who took a huge risk by buying a brand new, whole gun, taking me on nothing but my word that I'd buy the slide off him. Thanks again!)

Hey it looks good on there! :)

ruchik and I worked this out because he was looking for just a slide (he wanted a full-size slide on a compact frame) and I was looking for just a frame (I wanted one frame in SAO and one frame in DA/SA, which allowed me the ability to switch the Kadet kit back and forth and my 9mm slide back and forth between frames. I already had the SP-01 and the Kadet Kit when this started.). Worked out great :cool:


Jeremy

CAGLS
03-27-2013, 7:06 PM
This thread deserves to be bumped for it's valuable info on converting a DA/SA CZ to SAO. I did all the modifications (CGW race hammer, billet sear cage, 11lb hammer spring, removed fpb, cz custom sao straight trigger) except replace the fpb lever with a spacer. Ordered some from David and excited to see how this will shorten my reset. If anyone that has done this tell me how the reset is now.

CAGLS
03-31-2013, 11:29 PM
Replaced the fpb lever with the CGW spacer and this resulted in a significantly shorter reset and shorter trigger reach static position. I maxed out the pre travel adjustment screw which removed all the sa play and the over travel adustment right after the break.

JeremyS
04-03-2013, 12:33 AM
This thread deserves to be bumped for it's valuable info on converting a DA/SA CZ to SAO. I did all the modifications (CGW race hammer, billet sear cage, 11lb hammer spring, removed fpb, cz custom sao straight trigger) except replace the fpb lever with a spacer. Ordered some from David and excited to see how this will shorten my reset. If anyone that has done this tell me how the reset is now.

Sounds similar to my setup. The results were great and the trigger is almost impossible to beat!

I'm glad this thread got bumped, because up above is how my gun looked back in September, and here it is today:


https://lh4.googleusercontent.com/-PpjtXZS5YyM/UUKyEItNnXI/AAAAAAAAF6Y/M94PYZMfttM/s800/20130314_215149.jpg


^^^ CGW hammer, sights, and tuning... etc

daybreak
04-03-2013, 12:39 AM
This thread deserves to be bumped for it's valuable info on converting a DA/SA CZ to SAO. I did all the modifications (CGW race hammer, billet sear cage, 11lb hammer spring, removed fpb, cz custom sao straight trigger) except replace the fpb lever with a spacer. Ordered some from David and excited to see how this will shorten my reset. If anyone that has done this tell me how the reset is now.

I've done it to my SP01 SA conversion. Well, David did mine. Reset is similar to my shadow 75 SA.

daybreak
04-03-2013, 12:40 AM
pretty much the same as Jeremy's, minus his sweet threaded barrel.

CAGLS
04-03-2013, 12:48 AM
Man I want to put a can on my CZs.