Henning XL firing pin issue in Stock II

[Rockriverrenegade]

Installed a Henning XL firing pin in my StockII and am getting an audible "click" in the pre take up in double action mode. The click seems to be coming from something under the rear site. You can see the protruding piece move when looking between the slide and rear site from the gun's profile. Replaced with the factory firing pin and the issue is gone.

 

Any ideas?

 

thanks,

RRR

 

[MemphisMechanic]

That’s the firing pin block (safety) that you’re refering to. No idea why that’s happening: I’ve never seen a Henning pin in person. 

[Rockriverrenegade]

That seems about right. I'll have to look and see why the fpbs is getting hung up on the firing pin.

RRR

[johnbu]

Could be as simple as assembled wrong and when swapping parts, it was right.

 

(Wrong could be a pinched spring or even a bit of debris)

[Rockriverrenegade]

I spoke to Henning last night. He said he had never heard of this happening. He asked me to try a couple of things. I'll report back what the results are.

RRR

 

[Rockriverrenegade]

After trouble shooting, Here is what I sent to Henning to see his thoughts...

 

I swapped the XL firing pin back into my Stock II with the factory firing pin spring. It no longer made the click from the fpbs jumping up. Then I installed the XL with the reduced power firing pin spring, and again it would click from the fpbs jumping up.

 

What it looks like is happening is that the factory spring has enough pressure to push the firing pin fully out the back, holding the hammer slightly off the slide. The reduced power firing pin spring does not and the hammer lays flat against the back of the slide holding the firing pin in slightly. In that position the fpbs must be held in the down position and when the trigger is moved slightly back, it then releases up.

RRR

Edited May 16, 2018 by Rockriverrenegade

[Rockriverrenegade]

Update...

 

i have not not heard back from Henning. I have decided to stick with the factory firing pin and reduced power firing pin spring. This combo seems to work best for avoiding light strikes with the lighter hammer spring.

RRR

 

[MemphisMechanic]

Personally I don’t see a reason to spend money on an aftermaket pin for a tanfo, except that everyone else has.

 

They run great with a factory one, and they aren’t breaking.

[Rockriverrenegade]

The reason I tried the new firing pin was that with the lighter hammer spring I was getting light strikes. I was told by others to try the Henning firing pin, but was still getting light strikes. Found the light firing pin spring and went back to the factory firing pin. I will see if that solves the problem. I'm thinking it will. 

RRR

 

Edited May 23, 2018 by Rockriverrenegade

[HesedTech]

I have three Hennng firing pins, 2 S2s and a Limited, they all work perfect (smooth with no click). I did polish them so maybe yours isn’t as smooth as you would like. 

 

On the S2s I have installed the Titan Hammer and Extreme sear from PD which required the extended FPB (from PD) to make it function with the sear. The Limited has the Henning prepped sear and does not require (nor will it activate it) the FPB, so it has been removed. 

 

BTW the slightly longer FP makes the primer strikes a bit more reliable with reduced power hammer springs. I have run 11 lb springs with reliable strikes on WSP and Federal primers. Currently running 14.5 pound spring with About 2.5 lb SA and 6.5 DA.

 

Search for the polishing threads here on BE.

[Rockriverrenegade]

Appreciate the insite. The factory firing pin seems to be working. May leave well enough alone. 

RRR