Author Topic: Scorpion Evo 3 trigger reset problem (kit from CZ Custom)  (Read 469 times)

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Offline Nordman49

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Scorpion Evo 3 trigger reset problem (kit from CZ Custom)
« on: January 09, 2018, 04:49:29 PM »

I've just installed the CZ Evo Trigger Pack + CZ Scorpion EVO Disconnector UPGRADED-by CZ Custom

This is a huge improvement over the factory trigger !
But I have 2 serious problems  :(

- sometimes (every 3 or 4 shots) my trigger won't reset, and I must push it forward with my finger
- the safety won't work, the lever can't reach the Safety position (white)

Thanks in advance for your help !

Offline 3guneric

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Re: Scorpion Evo 3 trigger reset problem (kit from CZ Custom)
« Reply #1 on: January 09, 2018, 09:42:20 PM »
Contact CZ!  It is their product and they will guide you on resolving this.

Offline cntrydawwwg

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Re: Scorpion Evo 3 trigger reset problem (kit from CZ Custom)
« Reply #2 on: January 09, 2018, 09:50:47 PM »
Nordman49, CZCustom isn’t always on here. I’d give them a call, I’m sure they’ll get you up and running.
If guns are outlawed.........
 Only outlaws will have guns.

Offline Headspace

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Re: Scorpion Evo 3 trigger reset problem (kit from CZ Custom)
« Reply #3 on: January 10, 2018, 12:44:09 AM »
I had a similar problem with my CZC trigger pack resetting.
I installed HBI's trigger and disconnector spring which solved the reset issue for me.
In order to get your safety selector to work you'll have to do a little filing. See here for more info.;topicseen
Check that there's no interference between your trigger shoe and the lower receiver, specifically where it comes out in the trigger guard. If it's rubbing at all it may not reset with the lighter springs.
When it's work'n properly it's the best trigger out there for the Scorp IMO.
Best of luck to ya. :)
« Last Edit: January 10, 2018, 08:21:36 AM by Headspace »

Offline cocowheats

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Re: Scorpion Evo 3 trigger reset problem (kit from CZ Custom)
« Reply #4 on: January 10, 2018, 11:07:21 PM »
Had similar issues with the HBi kit. Just posted this for somebody having reset issues on the HBi kit but it holds true for anyone with reset issues.
I had reset issues after the HBi spring kit and a light polish job. After assuring the trigger roll pin was not rubbing in the lower, I found it to be a mix of poor relations between the sear to hammer and a bit under powered trigger reset spring. Gun would work fine until it got a bit dirty (I shoot mine primarily suppressed and noticed a fair amount of dirt in the trigger pack from doing so). When a bit dirty, the reset issue would occur with the HBi spring kit since it didn't have enough force to overcome the poor sear to hammer mating with the added dirt. Worked fine until dirty...this is with a polish job on all the trigger pack contact surfaces as well. If I'd reset the trigger slow enough after shots, it'd get stuck and I'd have to force it forward to reset it.

I ended up cutting a handful of coils off the oem trigger reset spring and stoning the disconnectors, hammer, and sear. MUCH smoother and no more issues since. I suggest looking at the relation between your sear and hammer while the trigger pack is dirty if you have reset issues. See if this is where your trigger is picking up the resistance during reset. Very easy to see if you work the trigger reset with the lower off. If you find that this is your hang up point, then you just need to take a bit off the back of the hammer and the underlip of the sear, polish, and perhaps mod the oem reset spring for slightly more forward oomph on the trigger shoe.

Basically, I had a little to much force being put on the sear from the hammer during trigger reset. I alleviated it by removing material and then polishing the mating surfaces so that the force was lessened allowing the trigger to reset easier. The cut down oem trigger reset spring was just for good measure. My trigger breaks at 4.2ish lbs with a tad bit of creep(like the Glock's gen 4 spongy creep that comes after pulling past the wall). Cleaning up the front of the hammer and disconnectors was just to smooth out the trigger pull, nothing to do with the reset issue.

It was a frustrating endeavor as I had to take a little off here and there at a time then test fit but the results are a gun that hasn't been cleaned in a few thousand rounds without trigger problems. I wish the trigger was crisper, but it ain't awful. It's just no Elftmann...

Make sure it's not your trigger roll pin rubbing in the lower too...
« Last Edit: January 10, 2018, 11:10:40 PM by cocowheats »