SKS trigger experts - reset issue help please

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madashell

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Looking for solution to SKS trigger reset issue

This is a 54' Izzy. Did a trigger job (i know what I'm doing, not a hack), this reset issue was there all along actually, it's just time to address it.

All I did for the trigger job is a light but smooth polish in the appropriate places, no angle changes, no real depth changes and swapped to a 3.5 pound MCarbo sear spring, that's it. And I gotta say it's surprisingly good trigger now coming in at a very smooth repeatable 4.5 pounds.

Here's the issue:
- when I charge the rifle (unloaded or loaded) and somewhat ride the bolt down (which I do not do, this is for diagnosis) it resets fine every time.

- when I charge the rifle and just let it slam home like it's supposed to it doesn't reset every time. Something about the carrier slamming the action moves something and no-go.

It's easy to see in the diagnostic window what's going on, just not 100% sure how to solve it properly.

There's only one youtube video I've found on this particular issue, but I'm not so sure about it. This gentleman's suggestion is to remove a little from top of bolt follower disconnector.
h ttps://www.youtube.com/watch?v=_-cAx7hB86Y

Seems to me the issue is bolt follower disconnector is not long enough causing the issue.

Any ideas here gentleman ?
Thank you.
 
You might consider putting the factory sear spring back in. If problem disappear, you have found source of problem

Ignore my post if this was present before the MCarbo kit. I can’t quite tell from your description

Oh and if you’re interested, bedding the Ska made a big difference for me. 2 1/4” groups at 100yd with factory sights. Pm me for pics if ya want
 
MusicianShooter,

Yeah this problem was there before the sear spring swap. I'm tweaking a 2nd 54' Izzy at the same time - same spring swap and trigger polishing and no issues. So something is up with this particular trigger.

Thanks for the offer on bedding pictures, I appreciate that. That's my next project and have collected a bunch of pics. I'll go through that folder again and if I feel it's lacking I'll send you a PM. Thank you for the offer.

I'd be very happy with 2 2/4" MOA for an SKS. Perfectly happy with that and it's about my goal. Is this with surplus ammo or other ?




MusicianShooter said:
You might consider putting the factory sear spring back in. If problem disappear, you have found source of problem

Ignore my post if this was present before the MCarbo kit. I can’t quite tell from your description

Oh and if you’re interested, bedding the Ska made a big difference for me. 2 1/4” groups at 100yd with factory sights. Pm me for pics if ya want
Click to expand...
 
madashell said:
MusicianShooter,

Yeah this problem was there before the sear spring swap. I'm tweaking a 2nd 54' Izzy at the same time - same spring swap and trigger polishing and no issues. So something is up with this particular trigger.

Thanks for the offer on bedding pictures, I appreciate that. That's my next project and have collected a bunch of pics. I'll go through that folder again and if I feel it's lacking I'll send you a PM. Thank you for the offer.

I'd be very happy with 2 2/4" MOA for an SKS. Perfectly happy with that and it's about my goal. Is this with surplus ammo or other ?
Click to expand...

Surplus. China or soviet. Not sure
 
is the trigger bar not engaging on the sear or does the hammer not sit on the sear ?
if those are ok , it has to be the disconnector , usually wear on top .
shim it with some tape on the bottom of the bolt and see what it does
 
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When charged (with lightly riding the handle) the trigger bar lifts to the hight expected and engages the sear no problem. There's a slight gap between the trigger bar and sear which I believe is normal. At least all the SKS's I've seen have that little gap.

This issue is only when I let the changing handle fly. When the carrier slams down, the trigger bar lands on the floor and it doesn't reset. Basically it's back to zero as if it hadn't been charged at all.


peacemaker56 said:
is the trigger bar not engaging on the sear or does the hammer not sit on the sear ?
Click to expand...
 
another little bit to add to the diagnostic mystery ... but along the same theme

- while holding the trigger back and pulling charging handle but lightly riding it down, then releasing trigger it resets as expected (then I can fire)

- then try same with trigger pulled back but let carrier fly, then releasing trigger it doesn't reset. It's as if nothing occurred, hammer didn't ####, nothing. So weird.

On closer inspection I am noticing the U-notch at the 45* point of the bolt follower disconnector seems to catch on the hammer. When trigger is out of action when I #### hammer and pull trigger it doesn't fire as normal (bolt follower disconnector is all the way up).

If I push the bolt follower disconnector down and then let go of it, it doesn't quite return all the way back up and catches a little. You can feel that it catches at the U-notch/hammer mating spot. Then I pull trigger and it fires when it should not. I have give the bolt follower disconnector a little tug so it sits back at the top where it's supposed to.

Hopefully that made sense
 
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