Glock 20 Gen 4 FTF's

[DAVIDF]

Are the Gen3's good to go like the SF's?  Local gun shop has a regular 20 Gen3...I like bigger grips. I ask this because if this Gen4 cant be fixed I'll have Glock replace it with another 9mm....and get the 20 from the shop.

Glock replaced my Gen4 20 with a Gen3 20 (regular frame, not SF) at my request. The Gen3 has been flawless.

[The_Shadow]

I just sent Glock a letter, trying to get them looking in to the issues so many are having with the Glock Gen4's.  While the Gen 3's and SF models have been much better, there has to be a solution that can be applied to remedy these issues.

Here is what I sent...

I am a moderator on the 10mmFirearms.com website and frequent various other related sites and it seem there are many experiencing issues with the newer Generation 4 pistols.  My interest is with the Glock 20 gen4, trying to help people all over understand/diagnose the issues they are  experiencing.

What I think needs to happen is for Glock to setup and observe these issues with the Glock 20 4th generations, using high speed cameras, playback in slow motion, and look for frame flexing, parts bouncing/moving under recoil or other induced stresses with real 10mm ammo, not the stuff at 40S&W ballistics.

I have to wonder if the "new frame design" that uses the various grip inserts, has caused a flexing of the frame with the higher impulsed ammo...   Is it flexing causing drag on the slide?  Looking for wear on the rails that the slide rides on, may not show up right away if the flex is bowing the frame up or down between the rails.

Then there is the current RSA which is also "new to the 4th Gen", is it part of the problems that so many people are having.
Is it enough for the control of the slide speeds?  Is it too much and causing a flex of the frame?

Why is it that the last round is staying in the magazine and not being picked up by the returning slide?  Is the slide stop not being held in proper location or is it bouncing at the time the round is trying to pop up, to cause the slide to lock open with rounds in the magazine. (BTW, this was noticed by S&W in their slow motion playback of video, during the development of the 10XX series.) 

There has to be a solution, to solve the issues being seen by so many Glock customers!  Glocks are great pistols but the latest gen4's have many disgusted.

The Gen 3's have run mostly without issues, my G-20SF has run flawlessly in stock configuration and even with the Wolff 22 non captive recoil rod & 22lb spring, it has also runs well with the LWD 6" 9x25Dillon barrel as tested also.  My G-29 also runs flawlessly.

Please find a solution to fix these great pistols...
Thanks,
Wade

Hopefully this will not fall on deaf ears, we need a reliable pistol that we can trust to work every time!

[PandaBear]

Nicely put!

I am tired of having my last round in the mag not feed. I will likely give Glock a call if the Wolff 10% spring doesn't fix the problem.

[mt10mm]

All glock owners will problems with their 4th gens need to bugging them till they get it fixed.

[445 supermag]

I just sent Glock a letter, trying to get them looking in to the issues so many are having with the Glock Gen4's.  While the Gen 3's and SF models have been much better, there has to be a solution that can be applied to remedy these issues.

Here is what I sent...

I am a moderator on the 10mmFirearms.com website and frequent various other related sites and it seem there are many experiencing issues with the newer Generation 4 pistols.  My interest is with the Glock 20 gen4, trying to help people all over understand/diagnose the issues they are  experiencing.

What I think needs to happen is for Glock to setup and observe these issues with the Glock 20 4th generations, using high speed cameras, playback in slow motion, and look for frame flexing, parts bouncing/moving under recoil or other induced stresses with real 10mm ammo, not the stuff at 40S&W ballistics.

I have to wonder if the "new frame design" that uses the various grip inserts, has caused a flexing of the frame with the higher impulsed ammo...   Is it flexing causing drag on the slide?  Looking for wear on the rails that the slide rides on, may not show up right away if the flex is bowing the frame up or down between the rails.

Then there is the current RSA which is also "new to the 4th Gen", is it part of the problems that so many people are having.
Is it enough for the control of the slide speeds?  Is it too much and causing a flex of the frame?

Why is it that the last round is staying in the magazine and not being picked up by the returning slide?  Is the slide stop not being held in proper location or is it bouncing at the time the round is trying to pop up, to cause the slide to lock open with rounds in the magazine. (BTW, this was noticed by S&W in their slow motion playback of video, during the development of the 10XX series.) 

There has to be a solution, to solve the issues being seen by so many Glock customers!  Glocks are great pistols but the latest gen4's have many disgusted.

The Gen 3's have run mostly without issues, my G-20SF has run flawlessly in stock configuration and even with the Wolff 22 non captive recoil rod & 22lb spring, it has also runs well with the LWD 6" 9x25Dillon barrel as tested also.  My G-29 also runs flawlessly.

Please find a solution to fix these great pistols...
Thanks,
Wade

Hopefully this will not fall on deaf ears, we need a reliable pistol that we can trust to work every time!

did you get any reply from them?

Brian

[The_Shadow]

Nada, Nothing, Zilch...No Response at all yet!   

[chucky2]

Got a reply from the guy I e-mailed but he called me, and I don't have time to call him back.  I'll e-mail him back later today when I get un-insane here, but my start of next week will be a disaster also, so I have no idea when I'll get back in touch with him.  I really hope he was calling me back to either say they are going to take a real look into the issue, or, call me back with questions about posting here.  If he is calling me back to say it's an ammo problem, then...that's a problem.  I think we've pretty much established at this point, this isn't an ammo issue.

[n2horns]

Nicely put!

I am tired of having my last round in the mag not feed. I will likely give Glock a call if the Wolff 10% spring doesn't fix the problem.

IS this out of a g4 or g3?  Any updates/results?  My last round doesn't feed either in g3 with 21 lb spring on steel rod.

[PandaBear]

^Fully stock Gen 4.

[445 supermag]

Nada, Nothing, Zilch...No Response at all yet!   

that's crazy.   Yeah let's ignore it and it will go away.

[445 supermag]

Nicely put!

I am tired of having my last round in the mag not feed. I will likely give Glock a call if the Wolff 10% spring doesn't fix the problem.

IS this out of a g4 or g3?  Any updates/results?  My last round doesn't feed either in g3 with 21 lb spring on steel rod.

I had same problem. With my G 20sf gen 3 .  Last round left in mag with slide back.  But it's been much better since I changed thing.  No problems in the last few hundred rounds ..  i had a nice long post about what I did if you want to look it up.

brian

[radiotom]

Bought a new G20 SF and stuck a 24lb Wolff spring in it. Shot a bunch of 10mm today, recovered 159 brass cases. My wrist hurts...

1 FTF on DT 200grain, I 100% knew I was limp wristing that particular shot. Not worried.
1 FTF on the last mag of that new Underwood 180 Gold Dot. Probably limp wristed...that Underwood is serious business.... my wrists were really tired by the end and that was the last mag I shot.
1 slide lock back before feeding the last round of DT 200grain. I'm sure that's magazine related. (shot 5 different magazines at least twice each I believe and that's the only time it happened)

The brass wasn't getting launched 20 feet either. Probably more like 6-8 feet. When I had the 24lb Lone Wolf spring + adapter in the Gen 4 it would still go 20 feet just like with the stock Gen 4 spring.

All in all, much much much much much better than the Gen4. I'm calling Glock to send that pos back.

Would have been nice not to have any failures, but i know that I wasn't doing my part on that one shot, and also towards the end...

I've seen discussion on this website about frame flexing possibly being the problem...I think you guys are onto something with that. This is my first Gen 3 and the frame seems much harder and beefier than the Gen 4's. I've had failures with the Gen 4 where I most certainly was NOT limp wristing. Perhaps this makes it less tolerant of a loose grip than the Gen 3? If so, that is ridiculous. You are not going to have a perfect grip and posture in a defensive situation.

[4949shooter]

Good choice on the Gen 3. I am glad it is working out for you.

[radiotom]

Got a question for you guys. Why did Wolff send me a firing pin spring with my recoil spring?

[The_Shadow]

Wolff always sends the striker spring or firing pin spring with an order, the difference is explained below... If you experience light strikes to the primer without ignition you may need a new striker spring. 
If you have a hammer fired pistol and experience drag or pin wipe on the primers during firing a new spring may help.
Hey look at this way, even if you don't use it, you have a replacement in hand.

STRIKER SPRINGS
Fits All Glock Models
W. C. Wolff Company offers reduced power, factory standard, and extra power striker springs (firing pin springs) for Glock pistols. This spring will help improve the trigger pull. 
Warning: This spring is for competition use only - not for duty use.
Warning: Do not use extra power striker spring with reduced power recoil springs.
Reduced Power....: 4, 4.5 and 5 Lb.
Factory Standard..: 5.5 Lb.
Extra Power.........: 6 Lb.

In their FAQ's...http://www.gunsprings.com/faq

9. What is the difference between a firing pin spring and a striker spring?
A firing pin spring is actually a return spring as it returns and keeps the firing pin retracted.  The firing pin spring works in front of the firing pin pushing the firing pin away from the primer usually keeping it retracted in the slide.  When the  firing pin is struck by the hammer the impact force of the hammer overcomes the retraction force of firing pin spring and drives the firing pin into the primer.
A striker spring is actually the spring that causes the firing pin to striker the primer.  The striker spring works behind the firing pin.  When the gun is in the cocked position, the striker spring is compressed behind the firing pin. When the trigger is pulled the firing pin is released and the striker spring pushes the firing pin into the primer.  While technically incorrect, a striker spring is often referred to as a firing pin spring.