HBI trigger spring issue.

[MrHawkins]

I installed the HBI trigger spring kit and now I have a problem. Sometimes the trigger does not reset. I have to push the trigger forward to get it to reset. Anyone else have this issue?  Is it just a matter of getting it broke in? 

[Ktm45]

Did you install the shim that is on the larger hammer pin?  I have three of these springkits installed and I have found that in all three the shim works best. Do you run the stock trigger shoe? I ask this only because sometimes the trigger can rub On the plastic trigger housing. The stock springs don?t have an issue but when you go with the lighter springs it can stick. Check for burs on everything.

[MrHawkins]

I did install the shim and I?m running the factory shoe for now. What I found is the trs was shifting over against the sheet metal frame. The last time I pushed it back it stayed. I just put about 50 rounds through it and it seems fine.

[Ktm45]

I?ve noticed that the spring always migrates against the frame also. I?ve never got one to stay put but after some rounds everything just works in.

[gary.russell.96930]

Tweak the foot of that spring to bias it away from the edge. Worked for me.

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[OpusXJ]

If the short leg isn't seated in the correct spot the long leg will migrate over. The long leg should be against the sear and the short leg as close to the wall of the trigger case as possible.

[MrHawkins]

If the short leg isn't seated in the correct spot the long leg will migrate over. The long leg should be against the sear and the short leg as close to the wall of the trigger case as possible.

Thanks for the info.  I was pretty sure it was but I will give it another look. 

[hyperpm]

I had the same issue where it would veer towards frame. Forced whole spring  towards the inside and stayed put. Bent the longer end a bit just in case.


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[HBi]

If the short leg isn't seated in the correct spot the long leg will migrate over. The long leg should be against the sear and the short leg as close to the wall of the trigger case as possible.

^This. Couple pictures below for reference. Note that in most cases the short leg on the bottom is actually the culprit, dragging and binding with the trigger. If the top leg is straight but the bottom leg still crossed or angled sideways the long leg will continue to migrate back over because it is under torsion from the bottom leg still. If that makes sense? The trigger pack does not need to be disassembled, you can just slide the legs into the correct orientation from above. Dental picks, pocket screw drivers, and industrial tweezers are good tools to use here; but honestly one of the best is jsut a small pocket knife blade.

[mountainrider]

I logged on with the intention to research previous threads on this subject before resorting to calling HBI;

My carbine started doing this sticky trigger thing at the last range session. I can't recall how many post spring install/no issue rounds were sent down range prior to the glitch, but it was a lot.

Thanks for responding HBI. I'll post back after checking out the trigger pack and a testing session.

[MrHawkins]

If the short leg isn't seated in the correct spot the long leg will migrate over. The long leg should be against the sear and the short leg as close to the wall of the trigger case as possible.

^This. Couple pictures below for reference. Note that in most cases the short leg on the bottom is actually the culprit, dragging and binding with the trigger. If the top leg is straight but the bottom leg still crossed or angled sideways the long leg will continue to migrate back over because it is under torsion from the bottom leg still. If that makes sense? The trigger pack does not need to be disassembled, you can just slide the legs into the correct orientation from above. Dental picks, pocket screw drivers, and industrial tweezers are good tools to use here; but honestly one of the best is jsut a small pocket knife blade.

I verified mine is set like that and it still hangs up every 3rd or 4th round.  I just touch the back of it and it resets.  I have not installed my Theta shoe yet incase that matters. 

[HBi]

We've been seeing sheet metal housings where the pin holes are a hair too close together. To test this you can put the hammer in the forward position and slowly pull the trigger and release it, if you feel any binding it's a good bet the housing is the culprit.

To correct this we remove a little material from the back of the firing pin block arm, where it meets the pocket in the sear. CZ-UB has also discovered this issue as we've seen several factory guns with hand fitting in the same spot. You can use a nail file and go slow, there's no shame in sanding a bit and testing it a few times until it's running as it should.