SP-01 trigger issues at the local IDPA match

[selecw]

I have a DA/SA SP-01 and was shooting it today in the local IDPA match when I started to have significant trigger issues....

I can pull the trigger all the way to the rear without the hammer dropping in either DA or SA mode.

The problem occurs with the slide on or off the frame.

With a magazine inserted, the hammer will drop some of the time.

Any theories?

I have an 8.5lb hammer spring and factory sear. The reduced TR spring is installed. The gun has about 3000 rounds through it and hasn't missed a beat so far.

Thanks for the help

[CZinSC]

Is the trigger resetting? Is the trigger bar lifter spring pushing up on the trigger bar and causing the the trigger to reset? That's the only thing i can think of.

[sclagg]

First back the trigger set screw out a few turns...

They do move and can cause a problem like this.

[selecw]

First back the trigger set screw out a few turns...

They do move and can cause a problem like this.

I just backed it out till it wobbles. No luck.

[eerw]

take a look at the tension of the lifter spring.

[wurm]

I am pretty new to the CZ platform and a very similar thing happened to me a month or two ago. Turns out people saying to use some loctite on the mag catch spring screw were right. Mine had backed out a bit and the trigger bar lifter spring wasn't doing its job anymore, so I'm with eerw and CZinSC, check the lifter spring.

[reshp1]

Is the trigger pushing back the hammer in DA and just not releasing it, or is it just "dead" and not doing anything?

I'm seconding the trigger bar lifter spring idea. Check to see that it hasn't come out of the grooves under the trigger bar. Sometimes you'll inadvertently snag them with a rag when cleaning and pull them off the trigger bar.

Edited March 9, 2015 by reshp1

[selecw]

It was the trigger bar lifter screw. It has come loose. After I tightened it down, no more issues. Should have spotted that one. Thanks for all the ideas!