My 858 is dead!

[mark k]

I was shooting my 858 in the Blast Off this weekend when it apparently jammed. Upon closer inspection, I realized the locking lug recesses are deformed and preventing the bolt from closing. I've only shot about 600rds of Czech surplus through it. What a drag.
I feel fortunate it held together and didn't plant the bolt in my cheek.
Keep an eye out on your guns for this deformity.

 

[Stevo]

All original rifle or one that was nitro-carburized?

 

[mark k]

It was nitro carburized. Do you think that contributed to the wear? I understood it was just a surface treatment and shouldn't change the properties of the metal.

 

[Stevo]

It was nitro carburized. Do you think that contributed to the wear?

Absolutely. There was at least one batch done that messed up the heat treat of the receivers, leaving them too soft and causing damage like you have.

 

[jt_trouble]

Absolutely. There was at least one batch done that messed up the heat treat of the receivers, leaving them too soft and causing damage like you have.

Was this a known issue to the company that did the NC work and then sold them?

 

[bfiles]

Damn, glad your ok!!!!!
First time I have ever seen that

 

[.223Rem]

That's really bad. I check mine of wear like this when I clean it. Only thing close I've seen is slight peening on the top of the locking lug (top being where it bolt carrier, not the receiver).

 

[mark k]

Does anyone know the contact info for Rauch Tactical? They did the NC on my then new rifle.

 

[Stevo]

Was this a known issue to the company that did the NC work and then sold them?

No. They were customer rifles done as an aftermarket service.

Damn, glad your ok!!!!!
First time I have ever seen that

This is at least the third one that's been posted here. I've seen pics of a couple others.

 

[kyjelly44]

http://www.wolverinesupplies.com/details/13713/CZ858-22-LR-Conversion-Unit-Special-Package.aspx
would this be safe to use in the rifle ? could be an option ....

 

[Travis Bickle]

Why were people Nitro Carburizing them? Sounds pointless and expensive.

lol and apparently detrimental as well.

Glad it didn't end up worse for you man, no injury means a good day. Yeesh.

 

[svt1940]

What batch have this issue? First,second or third?
Joce

 

[mark k]

I think mine was the first batch. I got an email 3 years ago today saying it was ready. The promise was to impart an added durability and rust resistance. It delivered the latter. I've never cleaned the muzzle brake as a test and there's not a spot of rust after 3 years. Too bad about the durability!

 

[Major Sights]

My 858 is dead!

ATTEN -TION!
[youtube]Wn_iz8z2AGw[/youtube]

 

[Dad003]

this is better !

the 858 is not a US thing !

 

[mcknipau]

Does anyone have any more info on the messed up heat treatment? Mine was part of the first batch. The trigger pin retainer clip on mine became loose after refinishing and trying to re-stake it caused it to break. Does this sound like heat treatment issues?

 

[saskcop]

The rails on mine have a couple of funny wear marks on them but the gun still seem to run fine. No NC for me though.

 

[gewehr76]

buy an sks, problem solved.

 

[mmattockx]

buy an sks, problem solved.

Did you type that with a straight face?


Mark

 

[boss351cleveland]

I had the Nitro Carb done by Raunch Tactical too , i think mine was on the first or second batch .. I fired a crate or so since the work was done .. I dont know much about the NC process but i know it takes a hell of alot of heat to change the temper of carbon steel , like get it red glowing hot... sure dont think they get the parts that hot in the NC process ? What are the chances the heat treating was bad to start ? Im going to give mine a inspection now and post pics ..