FPB removal @ CZ- USA Kansas

[Boborg]

I am going to order a SA 9mm and asked Matt Hunter @ CZ-USA if I could have the FPB removal done before the pistol ships. His response was they would not remove any safety features. I have read several posts on the forum about having this done, so I wondered how to go about it. Do I need to contact the CZ Custom shop before ordering?  Thanks, Bob

[Cesar]

Read toward the bottom of the page in link:

http://czcustom.com/sanditriggerworksada.aspx

[KFD147]

If you would like to do it yourself, you can search the home gunsmithing section on how to do it. It is not very hard, but you will need to remove the FPB lifter next to the sear and replace it with a spacer for the pistol to preform correctly.


Jason

[Cesar]

You can actually replace original "B" sear, lifter and lifter's spring with non-B sear, cz-usa sells those sears for $9

[Stuart]

Yes..I would suspect as the factory..they won't disable a safety device.

easy enough to do yourself or get a local smith you trust to do it.
you can actually run the gun with the lifter in it without the block, but a new sear or a spacer is pretty cheap.

[rvbgtr]

Stuart,

Any downside to running the lifter with no FPB?  Does that negate improved reset?  Thanks

[Stuart]

no..the gun should fire if you don't get to the FPB lifter reset point since there is no block in the slide to activate.

[Cesar]

I think lifter's lower leg would need to be ground off as it interacts with trigger bar and reset would be much shorter without that leg.

One can test my claim by doing this on "B" gun:
- take slide off, pull trigger (hammer drops), hold trigger back, reset trigger bar and cock hammer again, release trigger slowly noticing reset point;
- pull trigger and hold it back, reset trigger bar and cock hammer, manually move lifter forward and slowly release trigger, notice point of reset.

[rvbgtr]

Thanks guys

[eric0424]

If you remove the firing pin block components from the slide (#'s 58 & 59) but not the frame (#"s 14 & 15), reset will not change.  Removing the #14 lifter and #15 spring and replacing them with the spacer, or by using the Pre-B sear, will cut your reset travel in half.  Or at least that's the case with my stainless 75B.

If I were removing the firing pin block I would use the spacer, you may have to fit the new Pre-B sear if you chose that route.  With the spacer there will be no fitting involved.  Grinding and/or filing the bottom leg down on the #14 lifter will work too, but if you decide later to put the firing pin block components back in you will probably have to buy a new lifter to replace the one you modified.

For those who want to gauge how much reset will change on the trigger after the firing pin block lifter and spring are removed, You can try the procedure below.

Remove your slide, cock the hammer, then press down on the trigger bar (#7) while pulling the trigger all the way back.  Now remove the pressure on the trigger bar and slowly release the trigger, make a mental note of where it resets, you'll hear the click and see the trigger bar raise a little when it does.  Perform the same procedure again, but this time hold the firing pin block lifter (#14) up before you start to release the trigger. 

With my 75B it was about half the distance needed to reset with the firing pin block components. 

[Stuart]

Actually..
try this..
once you pull the trigger..release very slowly..you will feel the sear click and reset. keep releasing you will feel and here the lifter click and reset.
if you pull the trigger after the sear reset..the hammer will fall and you will light the primer if the block is not in place. if the block is in place nothing will happen because the lifter has not been reset and lifted the block.

Now..my recommendation would be if you are not going to use a block, replace the lifter with a spacer or trim the lifter, or install a preB sear.
no need for a unneeded part or spring.

but it will fire with it in there...just saying

[Cesar]

Reset on my 75SA with FPB is 8mm, without - 4mm.
And sear and lifter both reset at pretty much same exact time, I cannot distinguish 2 clicks, but I modified lifter's bottom leg.

[eric0424]

Reset on my 75SA with FPB is 8mm, without - 4mm.
And sear and lifter both reset at pretty much same exact time, I cannot distinguish 2 clicks, but I modified lifter's bottom leg.

My 75B is the same, all I get is the one click when both the sear and firing pin block lever reset.  Mine rests at 8.4mm with the firing pin block and 4.8mm with out it, not quite half but pretty close.

[Cesar]

If you didn't fuss with FPB lifter - it's normal
I can remove FPB and lifter, but IDPA rules are in the way    LOL