CZ455 trigger spring (bench or prone)

[deedah]

This is my first post, and hope you'll find it useful, and save around £15 on a single spring.


I bought a brand new CZ455 laminate thumbhole last month from Livens, I really like the gun, I'd tried one before buying it and the trigger was one thing I'd decided I'd probably upgrade even though it's not that bad out of the box.
I'd looked at the Rimfire Magic kit (2 springs, 1lb and the other 1.75 to 2lb) £12+£5 postage.
However I'm a tight fisted Yorkshireman, so I measured the pull on the factory trigger, it averaged 2lb 6 oz,
I also measured the trigger spring: 25mm long, 5mm OD, 0.83mm wire dia, 12 coils.
£17 seems a lot for one small compression spring, and having some experience with using springs in my time in as a maintenance fitter I knew that springs cost pennies not pounds.
I sourced one off that well known online auction/buy it now site, okay not pennies but £2.49 inc p&p is better than £17.00.
25mm long 5mm OD, 0.5mm wire dia and 12 coils in stainless steel, Identical to the original but a smaller wire dia.
Fitted it, bump tested it with the stock off using a ruubber and plastic hammer front, back, and sides, perfectly safe, resulted in a trigger pull of 13.2 oz, put three turns on the trigger nut and got 12.2oz, tested again.
The thing is the CZ trigger has very little trigger take up before firing even witrh the factory spring, I estimate half a mil now.
I would not advise this on a rifle used for bunny bashing or ratting, it's far too light, but for bench rest or prone target shooting it's perfect, 12oz is fine for most target shooters and you can spend the 15 quid you saved on some choccies for your better half.

 

[Phil fox man]

I used a spring from a biro pen on my Brno many years ago and it's still in it

 

[Smellydog]

Yup, you did what I does. Well done.
Sometimes the sears need work but not always.

 

[Phil fox man]

yes I just polished the burs off,as the release creep was ok.
on a side note different pens have different spring tensions.
long live "Fred in shed " fabrication

 

[deedah]

Great to see the old 'shed' engineering companies are still alive and kicking.
Looked at some biro springs but most needed cutting or too narrow.
Now call me a spendthrift, but I thought 'sod it' live dangerously for once,
£2.49 isn't going to break the bank.
Didn't have to touch the sear, unlike the Smith and Wesson 15-22, talk about rough
First time firing it felt like they had used an old file to make the hammer out of, bit of fettling with a diamond coated knife sharpening plate took the burrs off it,
Still pretty heavy at just over 4lb 12oz, but that's similar to a lot of semi-autos, and the problem is that the spring kits invariably don't work the trigger springs are okay but the hammer springs can be too light resulting in light strikes, so you end up putting the original hammer spring back in so uo're paying £20-£25 for one trigger spring that doesn't make that much difference. Don't even mention the drop in triggers £150-£200, hang on a minute, I need to get the de-fibrilator out
I'm going to put a post on the forum re the Smith and Wesson 15-22 asking for ideas on improving the trigger without breaking the bank.
Cheers Guys

 

[Smellydog]

I got a 10-22 recently. I've just about got it acceptable after many attempts all on standard springs except the trigger reset plunger spring. That spring needs to be strong enough to overcome the interrupter once the trigger is released so has a direct influence on trigger weight. So I've got a lighter but longer spring in there that is doing the job.
Whilst not like a glass rod snapping it's not causing me to pull shots like before.
I did one years ago and got it like a match trigger! Not this one but it's not bad now.

 

[Muir]

.... unlike the Smith and Wesson 15-22, talk about rough
First time firing it felt like they had used an old file to make the hammer out of, bit of fettling with a diamond coated knife sharpening plate took the burrs off it,
Still pretty heavy at just over 4lb 12oz, but that's similar to a lot of semi-autos, and the problem is that the spring kits invariably don't work the trigger springs are okay but the hammer springs can be too light resulting in light strikes, so you end up putting the original hammer spring back in so uo're paying £20-£25 for one trigger spring that doesn't make that much difference. Don't even mention the drop in triggers £150-£200, hang on a minute, I need to get the de-fibrilator out
I'm going to put a post on the forum re the Smith and Wesson 15-22 asking for ideas on improving the trigger without breaking the bank.
Cheers Guys

Any good drop in AR trigger will work. Yes. They are pricey.
S&W engineered that rifle to be a trainer so a 5 pound pull would be about the norm. I was fine with mine until I put in a Franklin Arsenal Binary trigger. I like that MUCH better but it was $275 US alone. ~Muir

 

[DesG]

I think the manufacturers sell their guns with a 4lb plus trigger pull for reasons brought about by this litigation age we live in.

I have put biro springs in dozens of CZ rifles at the club. Mine breaks very nicely at 15.7oz and passes the bump test quite happily. Possibly a bit light for field use but then I like a light trigger and always have the bolt open if I'm moving around anyway.

 

[Moose67]

I added springs from Yodave, who were happy to ship from Canada to UK

Yodave Products

cz 452 trigger kits and spring

www.yodaveproducts.com