Glock striker springs in MR9 and P99c AS!

I remember previous discussions on this forum where people who installed Glock striker springs in their P99/PPQ pistols, had issues with light primer strikes.

Walther installed a striker spring of a certain weight in the PPQ. The striker spring on a SAO pistol like the PPQ has very little impact on the trigger pull, but Walther chose that weight. I'd assume that this would probably be a good baseline as far as what the optimal spring rate would be for reliability, being that Walther would have no reason other than reliability to put that weight of striker spring in the PPQ.

I'd advise against this on a defensive pistol. How many people have tested these springs in the cold? How about when the pistol was dirty? How about when the pistol was dry? How about when the spring has had a few thousand rounds through it? How about in wet conditions? How about with all the different types of ammunition with all the different types of primers in all of the above conditions?

Walther has done these tests. The design has proven to be reliable, with the stock springs. Be careful when trying to redesign firearms on your own, and I'm saying this leaving off possible safety issues being that it has been proven that the striker can and will fall on cocked 99-series pistols with a hard enough impact on the back of the pistol. Lighter striker springs mean that it would take a lighter impact, and I'm sure someone will come along shortly on this thread and mention how much better their trigger pull is with a lighter firing pin block spring as well.

I only remember reading about light primer strikes with glock springs in the '99QA versions. Not saying there weren't posts/threads about the AS, I probably never read them as I wasn't interested in changing the trigger feel of my P99cAS.

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I've read of a few reports of this here on this forum just within the past year from people who wanted to lower the weight of the DA trigger pull. I don't want to take too much time searching for the threads, but here's one that I found pretty quickly:

https://www.waltherforums.com/forum/p99/110914-few-comments-about-my-new-p99-4.html

1stnamebassist didn't have issues with his pistol until a lighter Glock striker spring was installed, and there have been plenty of reports of this before. People have been testing with Glock striker springs in these pistols on this forum for over a decade already, and many people have had issues going with too light of a spring in the past.

I've also noticed that most people who claim to have tested the pistols with the new springs don't do so properly, in my opinion.

Keep in mind that most people don't know that on a DA/SA pistol, the DA trigger pull does not cock the striker as far to the rear as a SA trigger pull when releasing the hammer/striker, which results in a lighter strike on the DA trigger pull, regardless of what weight spring is used. So, how many DA trigger pulls have people tested on these pistols that supposedly have "X" amount of "flawless" rounds through them since the spring change? This information is useless unless we know how many of those rounds were fired with the DA trigger pull. I often see people at the range with DA/SA pistols who never use the DA trigger pull, and only use the SA trigger, which impacts the primer with more force.

As for the PPQ, I wasn't aware that changing the striker spring would have much if any affect on the trigger pull...

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Which was exactly my point.

It has little to no effect on the trigger pull, but Walther put that weight spring in there.

Why?

The only logical reason I can think of would be that it is the optimal weight striker spring in regards to reliability. Are you sure you want to go lower? I'd suggest that you don't, which is why I made my last post earlier, but if you suggest that others do, I'd very much appreciate it if you stated exactly how many DA trigger pulls you've made on live ammunition after the swap, and in what conditions you tested the pistol, and with what ammunition was in the chamber when you tested this new spring. If someone doesn't provide that information, I'd suggest you take their reports of "flawless" function with a grain of salt, and I'd suggest using caution when buying used pistols from anyone who is or who has ever read this forum and thought they could redesign these pistols for the better with absolutely no side effects.

Edit: You got me curious about the drop safe issue. I just tested both the P99c AS and MR9 with cocked strikers and pre-staged trigger (out of the AS mode) by hitting the back of the slide with my hand and dropping them a couple of times from chest height. While certainly not a comprehensive scientific test, the striker didn't release. Not saying it couldn't happen, but I think it would take a rather extreme amount of force (like smacking the back of the pistol with a hammer enough to actually damage it). So much so that I'm thinking the Glock spring and OEM striker spring would probably need nearly the same amount of force to release them.

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https://pistol-forum.com/showthread.php?26913-Return-of-Mallet-Mallet-vs-PPQ

18" is a foot and a half. A lighter striker spring would allow the striker to drop with an even less forceful impact. Combine that with others on this forum advising that people go with lighter firing pin block springs, and I hope you can see why I make these posts. I'm curious what testing these other forum members did to determine that their lighter firing pin block spring was safe enough. I'll wait for those reports as well.


I trust the manufacturer more than I do random members on internet forums. I'd suggest you do the same, and I'd include myself in that category of individuals. At least the manufacturer is liable if they are the cause of putting out an unsafe product. Is anyone here who is cavalierly advising spring changes on pistols while doing little to no testing, going to go to court for you?