The CZ 452 Project. Part 1

12gsnapcaps

Well-Known Member
Hello all,

I have a lovely CZ 452 in 17.HMR which currently wears the original furniture. I bought it for a steal at £250, including a 5 round mag, ten round mag, SAK supressor, and hard case!
It's a varmint barrel, but a short one at 16". I'm also 6"4 so the extra weight of it isn't an issue.
Having shot the CZ 452 for some time now, I've really taken a like to it. So much so that my .22LR barely left the cabinet. Current accuracy is about 1-1.5 MOA.
However, I found it had a few problems;

1. The forend was very flexible left to right. I reckon that the bull barrel touches the forearm sometimes, maybe on the left, maybe on the right. It doesnt feel like the stock is snug and tight. It looks like an old stock.
2. The OEM 'American' wood stock was too small for me in overall size and LOP, and too slippery in the wet
3. The cheek piece on said stock was so low that I have more of a cheek weld than a chin weld!
4. the 3/8 dovetail rather than the standard 11mm dovetail was an arse and my 11m dovetail mounts worked but .... I always have had a feeling that they must be off centre, even if by 1/10 of a mm.

Therefore I've decided to take the plunge and have a crack at 'upgrading the gun' - I've upgraded and worked on a fair few air rifles and shotguns, oh and motorcycles, so i'm somewhat DIY minded.

Ive already done the following

1. Trigger upgrade kit
2. Enhanced/extended mainspring
3. extended magazine release

After looking on the marketplace, I've not been able to find the right 452 stock. Therefore I've picked up a reasonably priced Boyds Thumbhole Varmint 455 stock, which looks similar to the inletting of the 452 Varmint, and a pillar bedding kit from eBay, and i'm going to:

1. Adapt the 455 varmint stock to fit my 452 varmint action (I imagine this will take a while and involve some finicky woodworking!)
2. Pillar bed the rear dovetail lug into the stock using CZ 452 American Bedding Pillars | eBay
3. Glass bed the entire action

I have also grabbed some specific 3\8 to picatinny adapters from Hawke and some low picatinny NS mounts which i hope will drop my scope (previously it was 2 inches) and that coupled with the raised cheek piece of the new stock will give a good cheek weld.

This is the first post in my DIY series on the gun and I will add pictures and updates as I go along, whether they be success or failure!

I'm hoping my efforts will make it a more comfortable gun to shoot, more accurate, and look a tad more 'tacticool'!
 
Look forward to watching progress - good luck.
Thankyou. I like a challenge! Absoloutle worst case scenario I bugger it up and waste £100 but learn loads in the experience!

I have two other Centrefire rifles I want to glass bed so this will be a great practise for them.
 
This is how the rifle looks now. Accurate enough to hunt within 125 yards, but why settle with 'enough'?
 

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UPDATE:

I have decided not to progress with adapting the inletting of a 455 stock and to buy a specific 452 stock. This is going to cost me around £60 more BUT It's the more logical option regarding my skill set.

Current parts list purchased and waiting for:

Forest Camo Boyds Thumbhole stock CZ 452 .17HMR Varmint
Custom CNC Trigger Guard & bottom metal
Tactical Bolt Knob Extender
CZ 452 American .17HMR Pillar Bedding Kit
Hawke 3/8" dovetail to Picatinny Bases
Nikko Sterling `Low Picatinny Mounts
Aluminium Scope Throw Lever
Devcon Glass Bedding Compound
Kiwi Neutral Shoe Polish Release Agent
Table Vice
Rubber Mallet

I also now intend to re blue the bolt and bolt handle as it's worn down to silver.

I will update you again as parts arrive!
 
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have the same rifle ,put in a timney trigger now it does not fire ,it does fire, but not enough strike for the round to go off ,so will have to look at that .look forward to your forthcoming posts .
 
have the same rifle ,put in a timney trigger now it does not fire ,it does fire, but not enough strike for the round to go off ,so will have to look at that .look forward to your forthcoming posts .
That sounds like a mainspring problem or a broken firing pin perhaps. When you pull the trigger, is the firing pin striking the rim of the cartridge? Can you hear the firing pin releasing? Can you see the tip of the firing pin protruding from the hole at the end of the bolt? Might be worth taking your bolt apart, it's actually very easy and there are YouTube videos explaining how
 
That sounds like a mainspring problem or a broken firing pin perhaps. When you pull the trigger, is the firing pin striking the rim of the cartridge? Can you hear the firing pin releasing? Can you see the tip of the firing pin protruding from the hole at the end of the bolt? Might be worth taking your bolt apart, it's actually very easy and there are YouTube videos explaining
 
have taken the bolt apart and cleaned it all out ect .the pin does strike the case but not hard enough i think .all started when i swapped out the trigger for a timney unit changed it but then the safety catch would not work .took it to local gun shop they so say took the bolt apart and cleaned it and hay presto the safety catch is back working .but now it dont fire .
 
have taken the bolt apart and cleaned it all out ect .the pin does strike the case but not hard enough i think .all started when i swapped out the trigger for a timney unit changed it but then the safety catch would not work .took it to local gun shop they so say took the bolt apart and cleaned it and hay presto the safety catch is back working .but now it dont fire .
Ok i think it needs an extra power mainspring. They're on eBay or czrifles.co.uk do them. Or put the original trigger back in and sell me the timney one :P
 
Just got back in from bunny bashing with my .17hmr. My nv is on my cz 455 and my cz 452 has my day scope. I find the 455 bolt smoother, always puts the bullet in the barrel, where the 452 has to have several goes on the odd occasion. Both .17hmr’s.
I do like my boyd stock, it’s a evolution model, so ambidextrous.
 
Any photographs of the project so far? I have a 452 Silhouette in .22 and the only upgrade so far is a YoDave trigger kit and a vinyl wrap. I've been toying with the thought of a thumbhole stock for a while though, to be honest.

Absolutely superb rifles though, and can only get only better with a bit of fettling :thumb:
 
Any photographs of the project so far? I have a 452 Silhouette in .22 and the only upgrade so far is a YoDave trigger kit and a vinyl wrap. I've been toying with the thought of a thumbhole stock for a while though, to be honest.

Absolutely superb rifles though, and can only get only better with a bit of fettling :thumb:
Not yet, I'm waiting on the parts but I'll be taking some 'before' pics end of this week and some pics of the parts and equipment I'll be using. The mainspring I linked to above makes a big different for the cost of a tenner. Better lock time and I've never had a light strike using it.
 
Can't wait to see how you get on with it! I'm liking this :love:
452's are cheap now and they're just as good as 455's and 457's. Can't wait to make this rifle exactly my own and with the knowledge that I did all the work. I fully refurbed and specced out a air arms prosport I bought slightly knackered for £200 and I Love shooting it for that reason, custom gun that I made myself
 
Changed my mind again and decided to go with the 455 stock and to just put the elbow grease in to adapt it. Fitted the 3/8" picatinny bases to the action. Just doing a little bit at a time at the moment. Also disassembled and cleaned the bolt in an ultrasonic cleaner ready for a polish and then a reblueing, pics to follow soon
 

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Change my .22 452 stock few years ago after a dog decided to eat the rubber pad ,I got hold of a thumbhole 455 and within 20mins of getting home a new fitting hole was drilled and action sits a treat .
 
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