I picked up an old frame safety 92 Stock and it stacks badly in DA. I suspect it has a heavy spring in it at the very least as none of my other 92's stack like this so trigger bar will likely be my first addition to it (beyond a d-spring)
No, I don't think that is the issue there. If you put your pistol in single action, when you take the slack out you can see the firing pin block come up. It does not take very much effort to raise that block.
The stacking comes from a combo of compressing the spring fully and the trigger bar hanging on the hammer hook. When those two parts are smooth and working correctly, there is almost no stacking.
www.langdontactical.com
Bellator,Doctus,Armatus
State Government Attorney | Beretta, Glock, CZ & S&W Fan
OK, I see where you're going. I've got an old LTT 92G here beside me that was done long before the days of the new xfer bar, and I've got a 92D which has a really great stock trigger pull. The D obviously hits a little wall right at the point where the firing pin block begins to move (trigger is probably 4/5 of the way back at this point). You can stroke the trigger all day with your eyes closed, feel the wall every time, and let off without firing every time.
Put the G in SA and there are two segments of pre-travel. The first of which is probably xfer bar pre-travel, the second of which is the firing pin block beginning to move. Then you hit the rest of the resistance which is when the block is raising the rest of the way and the hammer falls.
The stacking y'all are talking about must be literally at the very end of the pull. The stacking I'm thinking of is the additional weight of the firing pin block and is before what y'all are talking about. I had assumed the stacking at the very end was the firing pin block spring coil-binding.
So when you replace the xfer bar with the WC one, do you end up with something like a well-tuned CZ pull? I remember you'd suggested that I replace the xfer bar in this 92G a couple years back, but I couldn't remember what the reason for that was.
If by, "pretty immediately," you mean very near the end of the DA stroke, I agree with you. And it is only partially raised when you hit the full resistance of the SA stroke, on both pistols. The PX4 that I have handy is a lot smoother on the firing pin block action than the 92D. Both are stock guns. Obviously the LTT 92G had some work done to the block, so not really a fair comparison.