Has anyone installed the Henning Flat Trigger System in a Witness Hunter?

[asilcot10]

Is this a difficult DIY project? I have installed drop in triggers in Glock, XDM, and S&W Shield. No modifications or polishing to them. Just drop in and springs.

[sqlbullet]

I have had my witness all the way apart and back together again.  Henning used to have videos of a complete strip on his support section.  Last time I had my trigger out I used this video as a primer since it has been a few years:

https://www.youtube.com/watch?v=f2tFCmxScgw

It will be harder than a Glock.  I have no experience with XDM or Shield to compare.  But it is attainable.  Lots easier, IMHO if you can make a slave pin to hold the trigger spring while you put the assembly in the gun, but doable without a slave, as long as you can swear.  If you can't, you might learn.

TL;DR - You will need a hammer, punch and set of needle nose pliers.  You might learn some new swear words, but it is DIY.

[asilcot10]

Thanks for the reply. From what I understand, the Henning trigger uses a coil spring for the trigger that is supposed to be much easier to install. I have also read that it is not necessary to remove the sear housing from pistols with the factory "straight" trigger but it would be a shame to disassemble it that far and not polish the contact surfaces.

  I have all sorts of hammers, punches and small precision tools. I bought a set of roll pin punches when I did the Springfield. Language skills? I worked industrial maintenance as a pipefitter for 38 years. 'Nuff said?

[sqlbullet]

You will be fine. Get you some.

That said, I don't know how you would remove the trigger from the trigger/action stirrup without removing the sear assembly.  Doesn't matter as that part is really, really easy.  Like all you need is a toothpick, paperclip or ball-point pen.

Now if you mean disassemble the sear assembly, I have never done that.  I can't imagine there is much to it though other than a couple of pins.

[asilcot10]

As usual, I got sidetracked and just got this trigger installed this weekend. As I expected it was a bit more involved that the Glock and Springfield triggers but I found a decent YouTube video on disassembly and reassembly of the Witness. The "oh crap" moment came when I was polishing the trigger bar with a dremel after attaching the Henning trigger. There is no thread lock on the adjustment screws and the vibration from the Dremel caused the pretravel adjustment screw to back completely out and fall to the concrete floor in my shop. I must have found a couple of dozen steel pins from my Frankford Arsenal tumbler before I finally found that screw. The trigger does come with a spare of each screw but I really wanted to find that one.

  I have not fired the pistol with the new trigger yet but I really like the feel. My hands are larger than most people and I almost ordered the long trigger but decided at the last minute to go with the medium. That turned out to be a good decision. I was satisfied with the length of the factory trigger and Henning says that the medium is the same length.

  An allen wrench is included for one of the adjustment screws but the other one requires a T8 Torx bit to adjust.

[8strings8rounds]

As usual, I got sidetracked and just got this trigger installed this weekend. As I expected it was a bit more involved that the Glock and Springfield triggers but I found a decent YouTube video on disassembly and reassembly of the Witness. The "oh crap" moment came when I was polishing the trigger bar with a dremel after attaching the Henning trigger. There is no thread lock on the adjustment screws and the vibration from the Dremel caused the pretravel adjustment screw to back completely out and fall to the concrete floor in my shop. I must have found a couple of dozen steel pins from my Frankford Arsenal tumbler before I finally found that screw. The trigger does come with a spare of each screw but I really wanted to find that one.

  I have not fired the pistol with the new trigger yet but I really like the feel. My hands are larger than most people and I almost ordered the long trigger but decided at the last minute to go with the medium. That turned out to be a good decision. I was satisfied with the length of the factory trigger and Henning says that the medium is the same length.

  An allen wrench is included for one of the adjustment screws but the other one requires a T8 Torx bit to adjust.

Hey, I know this thread is a few months old, but I just now found it after ordering the Flat Trigger and Ultimate hammer/sear kit.
How did yours end up turning out?
I had my Hunter pretty well tuned with the stock parts, but can't wait for this to come in this week.

[asilcot10]

It was exactly what was needed to make this a really nice pistol. The curved trigger never really suited me and removing the slack from the take up and the reset was icing on the cake. Well worth the investment in time and money. I am sure you will like it.