Here is something you don't see everyday

[Birds Away]

Look at the pretty bushing and wait for the flash 

Yup, lol.

[handgun2]

so cool, been watching this thread a long time! fantastic work!,

just imagine... IF,  you had that barrel target champhered back .... just so slightly more.. to fit just under the new barrel bushing! from the business end! I gotta thinks that hole would look 'way' bigger.  just wondering/thinking!

great work! makes me wanna do on a few hanging around here.. never have tried my hand at rust blueing... where can I get some good information to 'start' like a pro? 

thanks in advance,
K in MI

[SPO1SHADOW]

Stay tuned, I sent my 11 degree cutter off to be sharpened 2 weeks ago. As soon as it gets back that is exactly what I have planed. I am also going to install an extended magazine release, an old style combat trigger with reach reduction and a fitted disco.
One of the best tutorials on rust bluing is done by Midway. Click the link below:
http://www.bing.com/videos/search?q=Rust+Bluing+at+Home&&view=detail&mid=B0BF6E13FA8D1C422FD5B0BF6E13FA8D1C422FD5&FORM=VRDGAR

[SPO1SHADOW]

Got my 11 degree crowning cutter back today. It is sharp!

[SPO1SHADOW]

I got up early this morning and quickly got out to the shop. I don't often get to work on my guns so today was going to be fun. I quickly disassembled it and got started. I never see much about the Pre-B safety on here other than to read about someone pulling it out and wondering what that was that flew across the room so I thought I would document how I get these torture devices out without any drama. First I use a heavy gauge paper clip to shape the holder. Push the safety half way between on and off and wiggle the holder into the hole on the outside of the safety lever until I feel it seat, after it seats I make sure it is in the arrow shaped tab BEFORE I pull the safety out of the gun. Below is the homemade holder and what it should look like when you get it out, or if for some reason you have to re-assemble it after it flies apart. This is the only part of a CZ I dread if it comes undone so I am very careful with the assembly once I get it out.




I had previously installed one of CZ Custom's hammers so while I had the gun apart this time I went ahead and fitted the safety to the sear so the safety now works. Below you can see the trigger bar that I smoothed and polished and the original pre-B disconnector that I will replace today with one of CGW's for the ultimate reset I am looking for.




Here is the stock pre-b disco, as you can see it is thicker than most of the later models and also rough as a cob. It gives a fairly good reset but I want it as good as it can be so I am changing it.


This is CGW's type 1 disco which has many improvements over the stock unit, it is thicker so there will be much less travel in the trigger before the reset, it is smooth as glass and only has one wing so the double action, which is already good, will be as good as it can be with less friction and smoother operation. I always radius the corner of the single wing before I install one of these to aid in the disco slipping back into the trigger bar. I also took a few thousands off of the face of the wing to set the trigger reach a little further to the rear in double action so my short stubby fingers can get a better purchase on the trigger.


I used the H-pin that came with the new disco and instead of staking the pin I use Loctite 620 on the last 1/8th before fully seating the pin. If you completely degrease the pin and the hammer and give the parts 24 hours to cure the pin will be locked into place without having to stake them.


Here are the 2 disco's for comparison. The difference between the 2 is dramatic.




The next part I wanted to replace was the stock trigger. The shape of some of the pre-B triggers mimic the Combat trigger minus the set screw such as the one that came with this gun originally. I wanted the stainless Combat trigger with the over travel and reach reduction screw for this gun. Here they are to compare.



The issue with using a trigger with set screws is they come loose. I have found that if you soak the trigger and the set screws in Acetone before you install the trigger and use a permanent type Loctite to set the screws after it has been installed into the frame and before any lubrication has been used there is no problem. I use the 620 on these also but if you do be sure you have them where you want them after the action has settled in because getting them loose after they cure is not going to be an easy task. Blue Loctite is recommended for the set screws, blue will let you change the settings without heat if you decide to change hammers or do any upgrades that change the action timing. Blue Loctite will also NOT hold up to oil and gun cleaners and will eventually come loose possibly at the worst possible moment. I don't plan on ever changing anything in this gun so rather than have either of the set screws loosen and back out I chose to install them permanently. 


I wanted a slightly extended magazine release. I did not want it to be as long or to stick out as far as the currently available extended releases and found the stock, cheap 85 Combat release to be perfect for this. It is not so much extended as it is flat and fully checkered. I find it much easier to access than the stock release without having to worry about accidentally bumping it and releasing the magazine unintentionally.





So with everything back together the action and trigger pull is better than anything I could have expected or wanted. As you can see the trigger is as far to the rear as possible and the trigger movement to reset is hardly detectable. I believe I am going to take it back apart and take away a little more metal off the face of the disco as it seems it's right at the point of not resetting. Be back later with the results.



 

[SPO1SHADOW]

So I removed the hammer assembly and shaved a few thousands off of the face of the #1 disco which gave a slight amount of wiggle in the trigger rather than it sitting right on the reset point. I installed the set screw in the reach reduction part of the trigger and carefully adjust it to have a slight amount of movement in it after the double action reset. Now I will have to wait until tomorrow for the 620 to cure and then I will do some test firing with the over travel screw in place to make sure everything is working properly. The 11 degree crown did improve the groups on this gun by a slight amount and it along with the 10X bushing has now got this gun into the one inch group category at 25 yards. This gun is quickly becoming my favorite not only because of the rarity of the pre-B frame with the round trigger guard and the transitional slide but it is performing now with the most expensive guns I own in every department. The reach reduction put the trigger at the perfect location for my trigger finger, can't wait for the Loctite to cure so I can get after it tomorrow on the range.

[Earl Keese]

Nice find on the mag release, looks like just enough to make a difference. Why did you choose the Type 1 Disco over the Type 3? All of your Pre-b's have been beautiful, but this one is something special for sure.

[SPO1SHADOW]

I measured where the gun was resetting against the thickness of the pre-B disco. Type one's thickness was going to be at or very close to where I wanted the trigger without having to remove a lot of material. As it turned out I was about 10 thousands off on my calculation and I had to remove about that much to make it perfect. Type 3 is much thicker than #1 and I would have had to remove a lot of material off of the 3 to get where I am now. The #1 disco was sitting right against the reset out of the package so the #3 would not have been the better choice, it would have entailed a lot more work to get to where I am now with the #1, as it turned out the 1 was not a drop in and I still had to fit it so going any thicker would have been counter productive just to be where I am. I still may have to remove more material off of the #1 when I get the gun hot because the trigger is only thousands ahead of the reset as it is.

[rich63]

SPO1SHADOW,

Thank you for your posts and pics of your latest gun. You do great work. I only wished I could do what you do. You got talent for sure.

rich63

[Earl Keese]

I measured where the gun was resetting against the thickness of the pre-B disco. Type one's thickness was going to at or very close to where I wanted the trigger without having to remove a lot of material. As it turned out I was about 10 thousands off on my calculation and I had to remove about that much to make it perfect. Type 3 is much thicker than #1 and I would have had to remove a lot of material off of the 3 to get where I am now. The #1 disco was sitting right against the reset out of the package so the #3 would not have been the better choice, it would have entailed a lot more work to get to where I am now with the #1, as it turned out the 1 was not a drop in and I still had to fit it so going any thicker would have been counter productive just to be where I am. I still may have to remove more material off of the #1 when I get the gun hot because the trigger is only thousands ahead of the reset as it is.

I figured you didn't need the extra thickness, just didn't know how you arrived at that conclusion. Thanks for taking time to explain.

[SPO1SHADOW]

I ended up needing to make one more swipe with the diamond bit to reach perfection. One nice even pass with the Moto Tool and then a quick polish with a fine Cratex finally did the trick. I have a tiny level affixed to the Moto tool to make sure I keep things level and also brushed on some Dye-Chem so I could make sure the pass was even. The last picture which was to show the nice even cut just didn't focus as it was supposed to but you get the idea. Now I have a nice audible reset with just a breath of further movement by the trigger. I call this one done.

 

[handgun2]

SPO1shadow,

WoW! thanks for photo on 'business' end! so cool!

k in MI

[CZlover714]

I rounded my 75B trigger guard as well, looks more like a Browning I guess

[SPO1SHADOW]

Many thanks to all the kind words and I hope everyone has a safe and enjoyable Thanksgiving Holiday coming up.

[timmy75]

This thread looks fantastic, can you please re-upload photos? Sorry for bumping 3 yo thread. Thanks.