Brand New Glock 19 Gen 4 Jams!

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GlockSmith

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So today was the first day I shot my Glock 19 Gen 4. I took it right out of the box and fired it at the range. I brought a friend with and we took turns shooting 15 rounds each. For some reason, the Glock jammed after the 1st shot approx 6 or 7 times. We fired a total of 300 rounds.

*Jamming happened to 2 different shooters
*We were not limp wristing
*Used Remmington and Winchester ammunition
*Happened with all 3 magazines

I took the gun to the place I bought it from and they had no idea what could have caused this but they did change the spring.

Does anyone have any idea what could have caused this? Thanks in advance.
 
Did you clean and lube the gun before shooting it? I always do this with any NIB before hitting the range. To many of the lubes that gun are shipped with are preservatives vs actual gun lubes.

Did you also check and clean the mags? I would also inspect those. Rinse and repeat.

Also would help to know what kind of failure you were experiencing. FTF or FTE?
 
GlockSmith said:
So today was the first day I shot my Glock 19 Gen 4. I took it right out of the box and fired it at the range. I brought a friend with and we took turns shooting 15 rounds each. For some reason, the Glock jammed after the 1st shot approx 6 or 7 times. We fired a total of 300 rounds.

*Jamming happened to 2 different shooters
*We were not limp wristing
*Used Remmington and Winchester ammunition
*Happened with all 3 magazines

I took the gun to the place I bought it from and they had no idea what could have caused this but they did change the spring.

Does anyone have any idea what could have caused this? Thanks in advance.
Click to expand...


Unfortunately common with the new Gen4 Glock 19s. Double recoil springs are a bit too stiff and feed problems are aggravated with a lot of lightly-loaded American made 115 fmj ammo. Winchester white box and Remington aren't really that "robust" either.

Try +P or NATO loadings, which is what the Glock was designed for, or at least try heavier bullets (124 or 147gr). Run a few hundred rounds to break the pistol in.


M
 
Thats interesting. They have no idea what caused it but decided to change the spring. Well if it runs 100% now. I would say it was the spring. That's what I've heard from most people that had issues with the gen4. Good luck
 
Anything made by man can have failures. As above poster said, type of failure makes it easier to diagnose. The only "perfection" in hand held weapons is the rock. It worked on Able, Goliath, and thousands since.
 
How about not even having the magazine in. Just use it as a single shot...this would rule out the magazine and feeding issues while testing its ability to eject.
I also read/viewed that the springs in the 9mm were a bit heavy and were being replaced with lighter units.
 
Thank you everyone for the quick replies!

The jam was a fte.

A guy at the range mentioned that I need to "break it in" a bit more too. I thought it was weird that he changed the spring as well.

Ill look into better ammunition for the range.

Im assuming I should clean it up and take it back to the range with some better ammunition and put another few hundred rounds through it before I send it back to Glock to get looked at.
 
Sounds like something is wrong with the individual gun. 500 rounds of mixed ammo (mostly AE though) through mine and not a single problem.
 
The guy at the store that I bought it from was convinced there was not a problem with the gun (yet he changed the spring). Im confused about that.
 
I don't know why he would change it if he didn't think anything is wrong with it. I heard a lot about spring issues with the Gen4 Glock 17 when it first came out. Not sure if people here are confusing those with the 19, but I haven't heard of many issues myself with the 19's spring.
 
GlockSmith, It is aggravating to have some problems after hearing all the time about Glocks reliability but, there are a few things that you can do to edge reliability in your favor with your Glock or for that matter, any pistol:

First: clean (especially the chamber and extractor - an old tooth brush is handy for cleaning behind the extractor claw) and properly lubricate the pistol - Glocks only need a few drops of oil, I use motor oil...and don't put any oil in the firing pin channel.

Second: load the mags with only 13 rds of ammo instead of 15 to lessen upward pressure on the slide at least until the mag springs have taken their set.

Third: use a little "hotter" ammo if available, 124 grain alone might do it but if it is nato spec or +P it's all the better for cycling the pistol.

Also, if the store gave you the same weight recoil spring (assembly) as what came in your pistol, then it'll have to be "broken in" as well - hand cycling the slide will do this without the expense of ammunition, also, lock the slide to the rear when not in use for the next few days.

Let us know how it goes...

Ken
 
Another satisfied customer.
Click to expand...

LOL

i have a list of power factor 9mm ammo that's best for gen4 9mm's, but cannot post it because i didn't compose the list, and don't know the author. i'm sure that would result in an "infraction" or "warning" form one of the multitude of mods on here.
 
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It's not a problem with the individual gun. This is happening with all Gen4's. 100 people could pick up your gun and 90 wouldn't have any problems. 10 people might have a problem, esp using low power ammo. Even though these 10 people aren't limpwristing, their wrist is just naturally a bit limper than average (just meaning they grip the gun differently and/or have smaller hands/arms/upper body).

The recoil spring is on the heavy side for American factory luger ammo, is all. Glock changed the 18lb spring to 17 lbs, years back, for the same reason. With the Gen4, they went back to the heavy side to address complaints of "snappy" recoil and increased wear on the .40 versions. Why they don't use a different weight spring for each caliber is beyond me.

Bottom line, when the spring breaks in, the problem will likely go away. But Glock does make a lighter spring, marked "04" on the end, vs the "03" of the stock spring. I have played with both, and I'll say there's not a whole lot of difference. The 04 is also a beast, compared to the gen3 spring. Either one works fine for me, but my friend had some trouble with the 03.
 
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While cleaning a new pistol is always a swell practice, it's not the issue with these gen4 9mm failures, as many others have already said, it's the dual recoil spring that is the culprit!

There have already been three(3)redesigns of the G-17 dual recoil spring, keeping in mind that the very first offering is exactly the same spring as the one riding in the gen4 G-22s, thats why the gen4 9's are failing! Just not enough slide velocity to work the springs unless you're feeding them +P or +P+.

On the other hand, the gen4 G-22's have been just great....What I find astonishing, is that Glock didn't immediately run into this while the 9mm's were being developed, it really makes one wonder as to how they vetted the 9's before releasing them to market, really just astonishing, almost Rugeresque of them...
 
Wow. Seems like I have a bunch of great information from everyone. Thank you all very much for sharing your knowledge and expertise!
 
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