CZ 453 Trigger Adjustment

[HEMI_Driver]

DISCLAIMER:
<--- IS NOT A GUNSMITH (and I don't even play one on the internet).

Just wanted to drop a note telling how easy it is to adjust the trigger on your CZ453. The factory adjustment of my CZ453 trigger was a little heavy for my taste even when using the set trigger. I personally don't like to unseat my action from the stock unless it is very necessary. I also have a mild fear of small parts going BOING!!! and then vanishing into a worm hole of the space/time continuum. I am happy to report I did manage to adjust my trigger without losing parts. Whats more is that it only took about 15 mins.

The product manual for the CZ453 can be found HERE online.
Trigger adjustment description... page 10. (page# indicated by your PDF viewer)
List of Parts.................... page 14.
Parts Diagram.................... page 18.
List of Illustrations............ page 20.

If you are not comfortable with your mechanical ability please leave internal adjustment of your trigger to someone who is qualified to do so.

<span style="font-weight: bold">***REMOVE THE MAGAZINE AND INSPECT THE CHAMBER!***
***ENSURE THAT YOUR FIREARM IS UNLOADED BEFORE PROCEEDING!***
***ALWAY POINT YOUR FIREARM IN A SAFE DIRECTION WHEN TESTING THE TRIGGER!***

***TREAT ALL FIREARMS AS IF THEY ARE LOADED***</span>

For adjustment of the Set Trigger Only... you only need to adjust the small screw visible in front of the trigger (see illustration #7 on page 20 of online manual). This will adjust the break of the set trigger. It is possible to adjust this screw so that the set trigger is no longer functional. If this happens simply adjust the screw clockwise until you are able to acquire an adequate purchase when setting the trigger. You do not need to cock the action to test the set trigger. You can set the trigger and then pull it testing for feel until you are happy with it. This might be enough of an adjustment for your liking. If so go no further.

It should be mentioned that adjusting the internal trigger will have an affect on the feel of the set trigger as far as trigger weight. A quicker break on the set trigger will give the feel of a lighter trigger. If you are unable to achieve a trigger feel to your liking with the set trigger adjustment screw you might have to move to the next step.

Removal of the action from the stock can be achieved by removing the three screws visible on the bottom metal. The front screw (Rear Stock Screw) is only attached to the wooden stock and is quite short. The other two screws (Trigger Guard Screws) are attached to the receiver. Use a stiff flat screwdriver with a wide blade and make sure you have a good purchase on each screw when you losen them so as not to chew up the edges. Once you have the three screws removed the bottom metal and a small plate that covers the trigger assembly can be removed and the reciever can easily be removed from the stock.

Once you have the reciever removed from the stock your trigger assembly will be exposed. The screw that adjusts trigger weight is the top most screw at the front of the trigger. This screw also has a set nut. On my trigger the set nut was not so tight that I was unable to turn the adjustment screw with a small jewelers screwdriver. This screw has a lot of adjustment room. All I did was carefully back the screw out until I started to feel some "wobble". This told me that I was about to run out of threads on the screw. I then moved the screw in about 1 full turn or so until there was no wobble. For me, this tells me that the screw has enough teeth gripping threads that it shouldn't vibrate lose during use. Tighten the set screw on the adjustment screw with a small open ended wrench until it is snug.

Test the feel of the trigger a few times and make adjustments as necessary. I didn't touch the other two screws as the travel before and after trigger break felt fine on my rifle.

Now is a good time to check your set trigger adjustment once again. Make adjustments to your set trigger as necessary. Set trigger adjustments aren't as crucial here since you can easily adjust the set trigger screw without removing the stock.

Reassemble your rifle.

Now function check your rifle. Cock the bolt and turn the safety on. Now slam the buttstock on the ground FIRMLY. The hammer should not drop. Now turn the safety off. Slam the buttstock on the ground FIRMLY again. The trigger should not drop. Dry fire your rifle. The trigger should operate normally. Test your trigger a few times this way to ensure everything is working as it is intended. If you have any function errors you may need to open up the rifle again and fine tune your adjustments.

END OF ADJUSTMENTS.

If I made any errors in my description/proceedures above please point it out to me and I'll make the necessary changes. This is the first time I've tried this but it didn't seem difficult at all. YMMV.

I was able to obtain a much better feel on my trigger. I don't have a way to measure pull weight but it is definitely a lot lighter.

I'll take the 453 to the range today, check zero and then pop off a box of rounds or so. I'll report back with the outcome. *crosses fingers*

 

[HEMI_Driver]

Re: CZ 453 Trigger Adjustment

Got back from the range in time to catch the kick off. Much better feel of the trigger. Everything functioned flawlessly. What's more is that my zero didn't change at all! I'm very happy with the outcome.