PMAG GL9 17 Round Mag Failure...

...of not quite epic proportions but bad nonetheless. 

I had just got done explaining to the HH6 some of the reasons why one carries at least one reload and why my long range shooting guru Mike, is I think silly for not ever having one on himself for his G43 when in the first 3 or 4 shots of my next run, I get a failure to fully feed. I dump the mag, rack the stuck round out, get my reload out and up into the gun rack in a fresh round and rock on with my run. 

Afterwards I pick up the mag and find the follower and spring stuck very near the bottom of the mag  tube.  I’ve heard of springs taking a set but have never experienced it. The HH6 asked what happened and I could only respond with “one of my nightmare scenarios , did you get that on video?” Oops, no. It was the only run she wasn’t recording. 

Has anyone had any similar experiences with Glock PMAG’s?

This mag had been loaded for about 2 weeks and was in my training mag bag waiting for use.

First time I’ve had any serious problem with one and I’ve got about 7 17 rounders and 3 or 4 21 rounders. All with several hundred troublefree rounds thru each of them until today. 

Mojo/Mark
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Yo homey, is that my briefcase...?
Vincent from "Collateral"
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You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

Original Post
DLehr posted:

Have you disassemble the mag yet?

Might it be a piece of grit got in there and jammed things up?

I haven’t yet, but plan to do so tomorrow morning.  It is mag # 10 in my rotation of 26 total mags. 

Mojo/Mark
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Yo homey, is that my briefcase...?
Vincent from "Collateral"
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You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

I've recently run into issues with GL9s, but not like you've described. 

I've had some pretty consistent premature lockbacks with the GL9 mags. I initially thought I was riding the slide catch too high, causing the malfunction, (which has been a problem of mine in the past). I replicated the issue with 3 GL9s, both 19 and 17 lengths, and I was running into 2-3 malfunctions per mag. 

Switching to OEM mags, I had zero issues. 

The only potential problem in my mind is that the mags have a significant amount of up and down play compared to OEM, which I'm guessing is allowing the mag to "jump" upwards under recoil and lock the slide. I've relegated them to training only. 

KyPlinker posted:

I've recently run into issues with GL9s, but not like you've described. 

I've had some pretty consistent premature lockbacks with the GL9 mags. I initially thought I was riding the slide catch too high, causing the malfunction, (which has been a problem of mine in the past). I replicated the issue with 3 GL9s, both 19 and 17 lengths, and I was running into 2-3 malfunctions per mag. 

Switching to OEM mags, I had zero issues. 

The only potential problem in my mind is that the mags have a significant amount of up and down play compared to OEM, which I'm guessing is allowing the mag to "jump" upwards under recoil and lock the slide. I've relegated them to training only. 

All of mine have been for training only. Ihave always used only Glock OEM’s for carry. Except for when I’m in CA. I have 3 ETS limited 10 round G19 mags for that. 

Mojo/Mark
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Yo homey, is that my briefcase...?
Vincent from "Collateral"
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You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

Interesting.  Perhaps the spring was not properly tempered/heat treated and took a set?

I have several Magpul Glock mags and a few of the ETS Glock mags.  I purchased them mostly out of curiosity, and use them for range work.  Duty carry remains OEM Glock mags as they have been unfailingly, boringly reliable in the 20 years I've used them.  One exception on that...I do carry a Magpul 21-round Glock mag as a universal spare when carrying with a kydex rig.  I use a Raven single mag/handcuff carrier and feel a bit better with the extra rounds.

I agree that there is little incentive to rely on non-OEM mags for serious use, they are not that much more than the aftermarket stuff (currently $19.99 at a few sources) and will last forever.  Personally, I think the PMAGS feel chunky and the feed lips make it harder/slower to thumb load vs OEM.  The ETS mags feel and look cheap...so far, they work ok, but I would never carry them on duty.  Clear mags are not "a thing," IMO.  Nor are they confidence inspiring, as the round stack gets pretty wonky and looks like it could never work right, LOL.  Also, loading them to capacity is a thumb-buster.

"It's when you fuck up that you will hear from your peers, not when you are doing your job. We expect people to do their jobs, and don't praise them like six year olds who successfully tied their shoes when they do. " - Fatty

 

If in doubt about the tone of my post, please refer to avatar.

I’m not really sure what to make of the GL9 PMAGs. I’ve seen people report zero issues with them (which is my experience), while others say they are the most disappointing thing to come out of the Magpul factory. The stuck follower issue has definitely been mentioned on various sites. Here’s a discussion over at ARFCOM about them:

https://www.ar15.com/forums/ha...epic-fail/23-177263/

Another “known” issue seems to be steel and aluminum cased ammo binding in them. I’ve seen that reported with ETS mags also. Possibly something to do with the metal casings against the polymer body. Seems to be associated with leaving the magazines loaded for a while. I’m testing that out by leaving four PMAG 21s and an ETS 31-round mag loaded with Monarch steel and Federal aluminum for a month or so.

I personally only want Glock PMAGs for the capacities that aren’t offered by Glock. The PMAG 21, for example, seems like a good size to keep in the glove compartment or a backpack for emergencies. Other than that, I’m sticking with factory mags.

Sportsmans Outdoor Warehouse has factory G19 mags on sale for $13.99 right now:

https://www.sportsmansoutdoors...oducts2.cfm/ID/21984

That’s the cheapest I’ve ever seen them.

Dave

We got pretty wet in a Pat Mac class last year.  Like, had to use a hair dryer on my armor panels wet.  Being a retarded sonofabitch I didn't even open my range box for a couple of months afterwards.  Lots of my 9mm ammo had turned green.  I unloaded all of the mags to put into a practice-ammo-only box.  The only mag that got a stuck follower was the single Glock Pmag I have.  That, combined with the only witness hole being at the full mark, kinda soured me on them.

Joined: 10/1/09                       Location: Columbia, SC

I was shooting Federal 115 Aluminum cased ammo and it was loaded for 2 weeks give or take a day of 2. Taking it apart now to see if there’s anything notable internally. 

Mojo/Mark
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Yo homey, is that my briefcase...?
Vincent from "Collateral"
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You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

Just took it apart, cleaned it and put it back together. Nothing unusual internally to report. 

I’ll just not use aluminum cased ammo in my PMAG’s and see if any further issues arise. 

Mojo/Mark
__________________________
Yo homey, is that my briefcase...?
Vincent from "Collateral"
__________________________
You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

After reading this I got a little concerned, I have had a 21 round MAGPUL loaded as a spare mag for several months. wondering if the springs had taken a set,  I shot it off at the range today, no failures to feed, slide locked back after the last round. Off course it was 147gr HST not some funky steel or aluminum case stuff.

I haven't had that issue with my Glock PMAGS. However, I my GL9's are a complete bitch to load to capacity and none of my 4 like to drop nicely from either of my G19s reliably. They are purely range mags for me. 

Sidenote, about a month or two back I had one of my OEM G17 Duty mags have its spring get stuck half way up twice like you're describing. Don't know how or why, I took it apart wiped it out and reassembled and haven't had an issue with it again. Quirk? Grit? Weird round hanging it up? No idea but its self-resolved. That mag was moved to training though for a new one.

--------------------------------------

Joined: 9/1/12

I’ve heard with the GL9 21 rounders that they get sluggish in pushing rounds up if they get dirty and you’re shooting at a pretty high cadence. I have 5 of them that have never been cleaned and I have not experienced this. As with my 17 rounders, for training only. 

Mojo/Mark
__________________________
Yo homey, is that my briefcase...?
Vincent from "Collateral"
__________________________
You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

We have had nothing but problems with Magpul Glock magazines. In any sort of dusty environment they locked up and would not feed rounds. The longer you leave the magazine loaded the worse it gets. 

Factory Glock magazines demonstrated none of these issues.  I have a stack of them that I will never use again.

Rick

The essence of war is violence. Moderation in war is imbecility. John A. Fisher

BooneGA posted:

We have had nothing but problems with Magpul Glock magazines. In any sort of dusty environment they locked up and would not feed rounds. The longer you leave the magazine loaded the worse it gets. 

Factory Glock magazines demonstrated none of these issues.  I have a stack of them that I will never use again.

Rick

Booze strikes again. "I have a stack of magpul magazines that I will never use again". 

Rick

The essence of war is violence. Moderation in war is imbecility. John A. Fisher

BooneGA posted:
BooneGA posted:

We have had nothing but problems with Magpul Glock magazines. In any sort of dusty environment they locked up and would not feed rounds. The longer you leave the magazine loaded the worse it gets. 

Factory Glock magazines demonstrated none of these issues.  I have a stack of them that I will never use again.

Rick

Booze strikes again. "I have a stack of magpul magazines that I will never use again". 

Rick

I think we all knew what you meant, booze or not. 

Mojo/Mark
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Yo homey, is that my briefcase...?
Vincent from "Collateral"
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You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

We purchased a bunch of 17 rd. Magpul mags for Department training and began to experience numerous failures to feed after about 6 months of use. Magpul said clean and lube them, try again. Did that, same results shortly thereafter.

Magpul replaced all of the mags, they also began to do the same thing after 5-6 months. I just said screw it and purchased Glock OEM mags. No problems since.

However, I personally use the heck out of some 21 rounders that work fine in my guns.

Chris

 

 

I posted:

 

Another “known” issue seems to be steel and aluminum cased ammo binding in them. I’ve seen that reported with ETS mags also. Possibly something to do with the metal casings against the polymer body. Seems to be associated with leaving the magazines loaded for a while. I’m testing that out by leaving four PMAG 21s and an ETS 31-round mag loaded with Monarch steel and Federal aluminum for a month or so.

 

I took my PMAGs and one ETS 31-round magazine to the range yesterday and tested them out after they sat for a month loaded with a mix of Federal Aluminum 115 gr and Monarch steel cased 115 gr. I experienced several malfunctions, but I'm not sure that I can attribute any of them directly to the magazines. I'll describe them and see what you all make of them. I used a new (2016) Gen 3 Glock 19 that had 600 rounds through it prior to this outing. The mistake that I made was that I hadn't shot these two types of ammo through it prior to today, only Federal brass, Winchester, and Independence, so I can't say if it would feed aluminum or steel ammo with Glock factory mags.

I had three light primer strikes with two 50-round boxes of the Monarch ammo (both from the same lot). I guess calling them "light" isn't accurate, because they were fully dented by the striker, they just failed to ignite. All three fired on the second attempt. That's the last time I buy that junk ammo. I had two failures to eject and one failure to extract with the Federal Aluminum. The first malfunction was pretty strange, and I unfortunately didn't think to take a photo. I was firing a PMAG 15 with an alternating mix of Monarch and Federal (just for kicks), and an aluminum casing stovepiped on the second round. What was strange was that the casing jammed the slide open behind the fully chambered, unfired third round. I've never seen that before and am not sure how it happened. It's possible I may have kind of limp-wristed that shot though. I just adjusted the rear sight, which was pushed too far to the left, so I was kind of awkwardly resting my elbows on the range table (which was too low) to test the accuracy on my first couple shots today.

The next malfunction happened with Federal Aluminum in a PMAG 21. The casing failed to fully eject and jammed the slide open as it was feeding the next round:

The last malfunction was with Federal in a different PMAG 21 (I have them numbered). The casing failed to fully extract and created a double feed:

I'm not sure if any of this could have been caused by the PMAGs - they do have pretty strong springs that might have been forcing the next round up against the casing as it was extracting, but I'm not sure if that's possible. I would estimate that all of these four PMAG 21s have been fully loaded and shot about a 5-10 times each, and the PMAG 15 about 25-30 times.

Going forward, I'm going to test this G19 with Federal Aluminum in factory mags just to see if it malfunctions. I've never had issues with these Glock PMAGs using aluminum ammo in my other G19, but I haven't left them stored like this before - just loaded them at the range and fired them immediately. I'll continue to shoot brass cased ammo out of the PMAGs, and I feel comfortable with their reliability using that kind of ammo. I don't plan to use them as carry mags - I stick with factory mags for that - but I like having the PMAG 21s around for "emergencies."

I have one (that was free) and though I've never had an issue, I don't trust it.  They remind me of the ChiCom polymer AR mags you'd see on the market 15-20 years ago.  It just feels "cheap" to me, and when loading I can tell the feeding process isn't very smooth.

Your life is worth more than the $5 you're saving vs purchasing a Glock mag.

Glad I'm not the only one.

I have two of the GL9 17rnders.  I've put at least 200 rnds through each, with a 2nd gen G17 and a 3rd gen G19.   These pistols run just fine with factory mags, of course.

These two mags are kept loaded.

Had high hopes for these mags, as it seemed like  for fhe first 100ish rounds they ran fine.  But I've experienced odd failures to extract causing double feeds, as well as failures to feed, wherein the follower has been stuck halfway through the mag.  When this happens I can hold the mag horizontally, bullets-down, and cartridges will dump out one at a time.  Cleaning does not help.

Perhaps they make good training mags, for practicing malfunction clearing?  I do not want any more of them, and will never trust them off the range.  Not worth saving a few bucks, in my view.

 

 

 

 

ViniVidivici posted:

Glad I'm not the only one.

I have two of the GL9 17rnders.  I've put at least 200 rnds through each, with a 2nd gen G17 and a 3rd gen G19.   These pistols run just fine with factory mags, of course.

These two mags are kept loaded.

Had high hopes for these mags, as it seemed like  for fhe first 100ish rounds they ran fine.  But I've experienced odd failures to extract causing double feeds, as well as failures to feed, wherein the follower has been stuck halfway through the mag.  When this happens I can hold the mag horizontally, bullets-down, and cartridges will dump out one at a time.  Cleaning does not help.

Perhaps they make good training mags, for practicing malfunction clearing?  I do not want any more of them, and will never trust them off the range.  Not worth saving a few bucks, in my view.

 

 

 

 

Holding it upside down my mag in the OP did the same. Rounds just trickled out one at a time. 

Mojo/Mark
__________________________
Yo homey, is that my briefcase...?
Vincent from "Collateral"
__________________________
You want the good life, you break your back, you snap your fingers, you snap your neck... Prong/Demon Hunter

Joined: 9/30/09
Location: Northern Nevada (Reno/Sparks)

My experiences haven't been consistent with those here. I used six of the 21rd magazines hard in a class last fall, on a sandy range. Cleaned them and put them into use as my spares on & off duty. No issues before or since. 

However, I shoot all of them dry using the duty ammo in them next week.

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