CZ Adjustable Sear in BETA


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schmeky
February 21, 2011, 05:56 PM
I have developed a CZ sear that has an adjustable safety leg. It consists of a brand new CZ factory sear, but it has been machined, modified, and tested in my machine shop, however, I need to get some of these out in the real world for actual testing.

I will supply a total of 10 sears for testing. There will be no charge for those that elect to participate. I will supply the sear and shipping. There are stipulations and I will gladly explain the limitations either in a pm or via e-mail at milam_nathan@yahoo.com Please understand, YOU MUST ACTIVELY USE THIS ITEM. I am not merely giving away a free sear.

This item is intended to eliminate the aggravation and tedious time consuming fitting of the sear safety leg when a CZ Custom Shop competition hammer is installed, or if you modify the stock CZ hammer.

A special thanks to The High Road Forum for giving me permission to post this.
http://i1082.photobucket.com/albums/j367/schmeky1/CZframerepair072.jpg

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WardenWolf
February 21, 2011, 06:05 PM
You better make absolutely sure they engage the disconnector properly. If not, you, and the person you send it to, are likely going to jail for a LONG time for making a "machine gun".

cz75bcrazy
February 21, 2011, 06:34 PM
I would love to try one I have a cz 75b and have been wanting to get a comp hammer for it but was a little worried about sanding down the leg to make it all fit, how do I sign up? Thanks

schmeky
February 21, 2011, 07:24 PM
WardenWolf,

I assume you are referring to the DA disconnector? If you are referring to the manual safety pad/sear interface, this should not be a problem.

I have tested this extensively and feel it is ready for beta testing. The sear safety leg is the only area modified. I appreciate your input

cz75bcrazy
February 23, 2011, 11:48 AM
I cant believe more people haven't jump on this so here a free bump

Sam1911
February 23, 2011, 12:20 PM
I don't suppose the part works in the Omega series guns? (Probably too much to ask.)

eerw
February 23, 2011, 01:24 PM
I believe the sear is different in the Omega guns.

The main advantage to this sear is if you are installing or fitting a new or modified hammer.
Which usually results in a change in the relationship of the sear and the safety that blocks the sear movement. As Schmeky explains his part is adjustable and makes easier this process. instead of modifying or having to replace more parts.

larryh1108
February 23, 2011, 06:30 PM
Will this work in the 75 COmpact model and/or the 40P model? Thanks.

schmeky
February 23, 2011, 08:00 PM
It will work in all "non-decocker" pistols. I have only designed this to work with the standard DA/SA mechanism.

eerw is correct. I have installed many CZ Custom Shop competition hammers and I keep my first experience in perspective. I ruined sear, and even with experience under your belt, it's still possible to miss the "sweet spot".

This adjustable sear will allow you to run any CZ hammer, the comp hammer, a standard hammer, or a modified stock hammer, and provide the perfect sear safety leg clearance, every time.

railroader
February 23, 2011, 08:18 PM
From the sounds of it this sear should make installing a comp hammer very easy. When fitting the sear on my 75 sa I had to put it in and out of the gun over and over until I filed enough material off. With an adjustable sear you can put it in once, adjust it and you are done. Mark

schmeky
February 23, 2011, 10:42 PM
Mark.

Precisely. If the adjustable sear works as intended, it will allow me to offer drop-in trigger kits using either a competition hammer of one of my machined stock CZ hammers. It could greatly simplify upgrading the CZ trigger.

Either way, the difference in SA trigger pull would be dramatic, and I hope to keep the cost very reasonable.

Matt-J2
February 23, 2011, 11:11 PM
If I were able to shoot more often I'd jump on this but I wouldn't be a useful beta tester at this time. I do wish to keep an eye out though for this and other things you may have in development.

larryh1108
February 24, 2011, 12:32 AM
Too bad. My Compact is the PCR which has a decocker and my 40P also has a decocker. Would have been fun!

cz75bcrazy
February 28, 2011, 09:13 PM
I can't wait to do some Beta testing been working on reloading this week :)

schmeky
February 28, 2011, 09:23 PM
cz75bcrazy,

I should be shipping out some beta sears this week

cz75bcrazy
February 28, 2011, 10:40 PM
Hey sounds great!!! can't wait to try it out.

phoenix79
March 2, 2011, 05:20 PM
How difficult would it be to put the comp hammer onto a CZ75 with one of these? I'm very mechanically inclined but never taken apart my CZ75 before (other than new mainspring).

schmeky
March 2, 2011, 10:57 PM
phoenix79,

The main problem with doing a hammer upgrade with a CZ is the slightest change in the hammer hooks affects the sear safety leg geometry. This means your manual safety will no longer work. Not good.

The only recourse is to tediously file and fit the sear safety leg. Sometimes you hit the sweet spot, many times you ruin the sear. A few thousanths of an inch is all you have to work with.

The adjustable sear will make any hammer upgrade a "drop-in" proposition. It will completely eliminate the guess work and tedious fitting.

I am shipping out the first batch of beta sears on 3-3-11. Hopefully I will get good input. If so, I will soon offer the sear by itself, or in a trigger kit that will allow most anyone to successfully drop-in an excellent CZ trigger kit.

ckone
March 3, 2011, 12:11 AM
phoenix79,

The main problem with doing a hammer upgrade with a CZ is the slightest change in the hammer hooks affects the sear safety leg geometry. This means your manual safety will no longer work. Not good.

The only recourse is to tediously file and fit the sear safety leg. Sometimes you hit the sweet spot, many times you ruin the sear. A few thousanths of an inch is all you have to work with.

The adjustable sear will make any hammer upgrade a "drop-in" proposition. It will completely eliminate the guess work and tedious fitting.

I am shipping out the first batch of beta sears on 3-3-11. Hopefully I will get good input. If so, I will soon offer the sear by itself, or in a trigger kit that will allow most anyone to successfully drop-in an excellent CZ trigger kit.
Schmeky, while I think it's great you're doing something like this and testing out possible goodies for CZs, modding the sear's safety leg to work with an aftermarket or modified hammer's different-than-stock angles is in reality just a good way to give yourself a headache... Yeah it's a PITA, and as you probably know, it's not the ONLY way, which is why most just fit the safety which is easy as pie and takes 10mins tops. Yeah, usually you'd want to alter the cheaper part first, but in the case of a CZ when talking about the difference between a $9 sear and an hour or so of cursing assembling/disassebling and then reassembling the sear-cage vs. working 5-10mins with a file/stone on the $35 safety that's simple and easy to take in and out and hard to mess up, I'll take the safety method every time.

That said, figure out how to make thin grips that are light and inexpensive too (maybe plastic or even kydex?), and you may be buying a new boat before the summer is through!

schmeky
March 3, 2011, 11:14 PM
ckone,

I don't disagree at all with what you are saying. But, being a long time 1911 guy, I have been indoctrinated into the "modify the cheapest part" philosophy. It only makes sense.

I am pretty mechanically inclined, and the first time I did the CZ Custom Shop comp hammer install, I botched the sear. So, I have to consider those that are less mechanically inclined, and keep in perspective my first time install experience.

The CZ Custom Shop sells a new sear for $32.00 plus shipping. If you could buy a new adjustable sear for around $48.00, plus $3.50 to ship, what would you do?

Walkalong
March 4, 2011, 11:19 AM
With advise and a helpful pic via PM from schmeky, I installed a competition hammer on my CZ 97B. I am quite mechanically inclined as well, and I got it right, but trust me, it would be very, very, easy to go to far with it, and I considered myself lucky to get it perfect on the first try. :)

The result is awesome, and well worth doing.

CZguy
March 4, 2011, 05:11 PM
schmeky,

Are you going to design one for a de-cocker, (PO-1) this thread is making me envious.

schmeky
March 4, 2011, 08:31 PM
CZguy,

I have not seen the sear for a decocker, yet. Since this only involves modification of the sear safety leg, I would need to see a decocker sear. I start with an OEM CZ sear and do eveything else in house from scratch. Here's a pic of the adjustable sear installed in a CZ action to give you an idea:
http://i1082.photobucket.com/albums/j367/schmeky1/CZframerepair090.jpg

JDGray
March 10, 2011, 05:54 PM
With Schmeky's permission, I am posting some pics of the installed sear in my 75B-SA. The sear install is very simple, and included adjustment instructions worked perfectly. Since I've worked on my CZs in the past, the install took all of 15min, by simply field stripping, removing the safety levers, removing the sear cage, replacing the sear. My factory hammer has been worked on, and it still has a very nice 1.5# pull after the install. My firing pin block lever has been removed, as the pics will show, and a spacer installed, so the sear was easier to install because of this, but a factory setup wouldn't be an issue if your carefull to not loose the FPB lever and tiny spring off the sear pivot pin as you swap the sear. Not sure if a competition hammer would actually help my pistol since my hammer has been recut, but this sear would be a perfect addition to the job.
http://i21.photobucket.com/albums/b278/JDG357/006-1.jpg
http://i21.photobucket.com/albums/b278/JDG357/005-3.jpg
http://i21.photobucket.com/albums/b278/JDG357/004-4.jpg
http://i21.photobucket.com/albums/b278/JDG357/003-6.jpg

ATBackPackin
March 10, 2011, 06:42 PM
Is this still available? How many rounds would you like to see tested?

I have a SP01, so I'm pretty sure it would fit. Would love to find out more, so if this is still available feel free to PM me. If not, best of luck.

Shawn

schmeky
March 10, 2011, 08:57 PM
JDGray,

The pictures are excellent. Thanks for the comments on the adjustable sear.


AtBackPackin,

I only had a limited number to ship out for testing. JDGray got the last one. I'm sorry. However, if I get positive feedback from the folks testing the sear, it will be available for purchase in the very near future.

One tester has about 360 rounds down range and will shoot 200 more this weekend. My CZ hit 400 rounds today with the beta sear. These 2 pistols have performed flawlessly to date. I hope to get 1,000 rounds from each tester with -0- problems.

I will be able to offer true "drop-in" trigger kits for CZ's very soon, based on the success of this sear. PM me if you want me to provide updates.

JDGray
March 11, 2011, 06:08 PM
200 flawless rounds today, safety lever adjustment did not move:)

Impureclient
March 11, 2011, 07:31 PM
I already filed/adjusted my safety to fit the competition hammer I installed. Would there be any reason at all to reinstall this over what I currently have in.
The reason I ask is when I have the hammer half cocked and switch the safety on it has a positive switch feeling and "click" sound when I put it on and off.
At full cock it kind of is mushy and doesn't make a click sound when putting the safety on. When taking the safety off in full cock it will make the click sound.
Is this being too picky you think? I imagine I need to just take off more of the safety but would this adjustable sear just take care of that?

mr.trooper
March 11, 2011, 08:11 PM
Neat!

schmeky
March 11, 2011, 09:56 PM
JDGray,

Thank you so much for the update. So far about half of the folks testing the sear report no problems; I should be getting reports from the other half next week. I hit 575 rounds with my beta sear equipped CZ today and the sear safety leg is working perfectly. My CZ has been 100% so far.

Impureclient,

It may cure your problem. The beauty of the adjustable sear is that you can hit the sweet spot perfectly, the first time, eveytime. All the beta testers have commented on how easy and accurately the adjustable sear is to mate to the manual safety. It only takes a few seconds.

If you enjoyed reading about "CZ Adjustable Sear in BETA" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!