858 Tabbed bolt carriers

Leviathan024

Leviathan024

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Hi all,

well my new cz 858 has been a disaster with the "gremlin" issue every 20 rounds or so and cartridges getting wedged causing a jam. It has been sent to wolverine for repair but they will not add a tab to the bolt carrier. I have almost lost faith in these rifles and the thought that i may pull the trigger and have nothing happen is discouraging. is there a company in Canada that sells or will modify my bolt carrier for a decent price? everywhere i have read about says they are too busy or no longer offer the service

thanks!
 
I should have worded that post better.
I have 2 issues with the cz. the first is the primer "Gremlin" issue with the rounds not going off and light dents in primer. The feeding issue is separate and basically the cartridges is hitting the feeding ramp and kicking off to the left and upward at a very sharp angle causing the cartridge to get caught before making it into the chamber.

Thanks for the info when my rifle arrives i will contact broncoo!
 
Leviathan024 said:
I should have worded that post better.
I have 2 issues with the cz. the first is the primer "Gremlin" issue with the rounds not going off and light dents in primer. The feeding issue is separate and basically the cartridges is hitting the feeding ramp and kicking off to the left and upward at a very sharp angle causing the cartridge to get caught before making it into the chamber.

Thanks for the info when my rifle arrives i will contact broncoo!
Click to expand...

Your feeding issue sounds like you have bent out of shape magazine lips to me.

Does your rifle have feeding troubles with all your magazines?

As for the light primer strikes, you may need to clean the firing pin channel of your bolt. As has been mentioned, the CZ858 "Gremlin" is the striker not being released when the trigger is pulled.
 
The feeding issue is separate and basically the cartridges is hitting the feeding ramp and kicking off to the left and upward at a very sharp angle causing the cartridge to get caught before making it into the chamber.
Click to expand...

went i buy my cz i got this problem with russian ammo , but wit other ammo no problem i just grind a litle bit were it block , now it feed à 100% no sharp edge now , just round corner and no problem


but dont grind to much ^^
 
shredder said:
Your feeding issue sounds like you have bent out of shape magazine lips to me.

Does your rifle have feeding troubles with all your magazines?

As for the light primer strikes, you may need to clean the firing pin channel of your bolt. As has been mentioned, the CZ858 "Gremlin" is the striker not being released when the trigger is pulled.
Click to expand...

Doesn't the gremlin cause light primer strikes as well? The striker doesn't disconnect and rides the bolt forward, causing light primer strikes as it follows the round into the chamber. That's what I have.
 
There is 2 gremlins that i know of. The tabbed carrier fixes the one where if you pull the trigger too fast you can actually lower the sear on the bolt carriers back stroke. and with the sear being in the lowered position (full trigger pull) the striker cannot catch the sear and rides by it before the disconnect is hit by the carrier causing the trigger to reset... however the striker has ridden forward so you get a dead trigger.

The second one is when you get too much slop in the sear and it can actually drift out of alignment and miss the trigger bar altogether this one has a very light pull as the sear spring is not being activated only the trigger has a small spring. if you get this gremlin the fix is install a small thin washer to make a nice tight fit of sear to trigger bar. this gremlin can cause your rifle to become difficult to disassemble if the striker is caught on the sear and you have a dead trigger from the lack of engagement in the trigger bars to the sear. see the above sticky.

there is also a problem some have encountered where the keeper that holds the sear and trigger pins in place can be flipped up and makes contact with the striker causing the rifle to jam up and making disassembly difficult. see the sticky above.

these rifles are very trouble shoot friendly not a lot to go wrong with them and there was never any issues when they had the full auto parts in em. I am getting the tabbed bolt carrier soon.
 
Not trying to thread jack, but this goes along with the topic, so hopefully no one minds.

I just picked up a 858 on EE, and the seller was nice enough to surprise me with te gremlin. I shot it for the first time yesterday, I could not get through a single magazine without it happening once (happened twice in a few mags), fire a round or two, then a dead trigger/no click, rack the bolt, to find a light primer strike on the chambered round.

I watched the video in the FAQ, showing that slop/play in the trigger group can cause this. So I felt the pins, and noticed play. So I shimmed the sear pin like the video shows. Today I went back, shot 40 rounds. First two mags were perfect, then it appeared once on the next few. So out of 8 mags in total, it did it 5 times. Noticeably better then yesterday before the shim, but still an issue obviously. I have noticed the lower pin (for the trigger) also has similar play, does this require shimming as well?
 
Thanks for all the info guys! I'm really losing interest in this rifle... Anyone want to buy mine when it gets back from wolverine so I can get a 7.62 xcr?
 
dont be .

i havent encounted any problem with the cz that i couldnt fix .

about your feeding issue , is it with commercial brass ? if so then just polish the shoulder where its gouging the brass .

Leviathan024 said:
Thanks for all the info guys! I'm really losing interest in this rifle... Anyone want to buy mine when it gets back from wolverine so I can get a 7.62 xcr?
Click to expand...
 
I am trying to stay positive about the cz but it seems its not what i though it was... i have used chinese copper washed surplus fmj and steel case lead MFS.
 
Keep in mind that the "light strikes" mentioned in a number of the posts above are perfectly normal.

Every round chambered in an 858 will have that mark, whether you pull the trigger on it or not. It's a by-product of the floating firing pin.
 
I just did some more reading on the issue I did not know that a Free floating firing pin causes these small indents everytime the bolt is closed. This makes me think it is the gremlin issue as the trigger is pulled and nothing happens.
 
Hi I don't have the gremlin, but the feeding issue where 2 cartridges look like they are fed with 1 almost in the chamber and the the other in an acute angle with the primer facing up. ( I am going to try using 1 mag at a time to find out if it is the mag)

there were 2 suggestions on the board:

1. Straighten up the mag lips.
2. polish the shoulder hitting the brass.

Please elaborate on these solutions a little.

A noob here..as you know the devil is sometimes in the details.

thanks.
 
marcjer said:
Hi I don't have the gremlin, but the feeding issue where 2 cartridges look like they are fed with 1 almost in the chamber and the the other in an acute angle with the primer facing up. ( I am going to try using 1 mag at a time to find out if it is the mag)

there were 2 suggestions on the board:

1. Straighten up the mag lips.
2. polish the shoulder hitting the brass.

Please elaborate on these solutions a little.

A noob here..as you know the devil is sometimes in the details.

thanks.
Click to expand...
Could also be that the area in the front of the magwell is not in spec causing the magazine not to seat properly hence giving you feeding issues. Also it can be the magazine itself that is fubar.
 
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