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blame canada
Picture of AKSuperDually
posted
I've been a die-hard Pmag fan for as long as I can remember Pmags being around. In the past, I've loaded them to the hilt, and left them for years without any issues. On my recent range trip (tuning and dialing my 300 blackout build), I experience 2 pmag failures. Both were gen 3 pmags, purchased this last winter, left loaded (with blackout) with 30 rounds in them for 3-4 months. No previous use, these were new mags. I went through my whole supply of Pmags, and found 1 more with a weak spring as well.

Replace springs? Call magpul? Just toss them, and write it off as coincidence? I've never had a pmag failure prior to this. I think replacing the spring should fix the issue. I hope. That may cost more than replacing the whole mag.

I intended these mags to live loaded, in my go bag. Should I be looking for another brand/mag for this purpose? I want to rely on these 100%. up until this incident, I thought Pmags were 100% reliable.


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
Member
Picture of dusty3030
posted Hide Post
I'd call them for sure. See if they'd swap them out.


Straight shootin!
dusty
 
Posts: 3077 | Location: Memphis, mf'n, TN | Registered: August 13, 2005Reply With QuoteReport This Post
Go ahead punk, make my day
posted Hide Post
Maybe I'm missing it, but what was the exact failure?

I see you mention 'weak spring' but that's about it.

I'd certainly get with Magpul, I imagine they'll get you fixed up right.
 
Posts: 36308 | Registered: July 12, 2008Reply With QuoteReport This Post
Member
posted Hide Post
How do you determine weak spring?

I bet Magpul will send you some new fancy 300blk pmags


________________________________
 
Posts: 6637 | Location: One step ahead of you | Registered: February 10, 2009Reply With QuoteReport This Post
sick puppy
posted Hide Post
Out of pure curiosity, what are the mag-related failures?

specifically thinking of the mag springs, if the bolt is cycling faster than the spring can come up with the next round, you'd get a cycled bolt, ejected case, but empty chamber - no new case loaded.

what are other mag-related failures?

i had ONE failure to feed with my AR10 on a pmag, but I didn't figure it was mag-related.


☣Biohazard☣
 
Posts: 6578 | Location: Alpine, Ut | Registered: February 17, 2010Reply With QuoteReport This Post
blame canada
Picture of AKSuperDually
posted Hide Post
I'm assuming the failure is a weak spring. I loaded them...and after time the rounds started "leaking" out. That is...the spring pressure on the follower was not maintained. In some cases, they would feed for 1-2 rounds, and then fail for 10-12 rounds, and then work for the rest. I took them apart, and did not find any debris inside, or any edges for the follower to catch on. The springs are noticeably weak now.

So far it is seeming that all of my gen3 pmags loaded with 300 blackout are failing... so...? Too heavy of a round? I probably purchased them all at the same time, from the same location...so perhaps a bad batch?

I did contact magpul. Waiting for a response.


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
Member
posted Hide Post
Let them know.
They will take care of you for sure.

They replaced 35 mags for me that would not drop free from my ar's.
Prepaid label was sent and replacements were mailed before they had my return in hand.
 
Posts: 246 | Location: midwest | Registered: May 29, 2007Reply With QuoteReport This Post
Go ahead punk, make my day
posted Hide Post
I think the reason Magpul decided to come out with a 300BLK PMAG was the wide differences in 300BLK - Bullet weight, OAL, ideal feeding geometry.

Or maybe you got a bad lot of Mags. Either way I think they will get to the bottom of it with no hassle.
 
Posts: 36308 | Registered: July 12, 2008Reply With QuoteReport This Post
Member
posted Hide Post
Great as they may be no manufacturing company is immune to quality issues. Maybe a bad batch of springs.

They'll take care of it.

I'd send in all I have from that purchase.
 
Posts: 185 | Location: Michigan | Registered: March 11, 2013Reply With QuoteReport This Post
blame canada
Picture of AKSuperDually
posted Hide Post
The response from them is that 5.56 gen3 PMAGS aren't really designed for the blackout cartridge. They've not experienced any failures like I'm describing, and I should change out to the new 300 blackout PMAG. They stated the only failures they've seen are from split/damaged mags. I cannot find any evidence of spits/cracks/damage. These were bought new, loaded, stored with dust covers on....and failed in the first use.

I think I got a bad lot of springs, as I've not had these failures in the other pmags from a different lot and generation. I'm on my own to solve this it looks like.

I'll probably buy some aftermarket springs from elsewhere.

I've sent 2 or 3 emails back and forth with them...basically, this doesn't happen and there are no known "bad batches" or spring failures. They don't seem to believe me.

The solution is that I should purchase their new blackout mags. I may look around a bit.


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
To all of you who are serving or have served our country, Thank You
Picture of Jelly
posted Hide Post
My experance with the 300 blackout on two of them is they can be finicky on magazines. I have not tried any of the newer dedicated 300 blackout magazines. PMAG and D&H have made some perhaps more I don't know. I did have good luck with the Lancer 20 round magazines so I just went with that.


...... Boycott NFL.. American against the NFL
 
Posts: 1282 | Registered: March 15, 2004Reply With QuoteReport This Post
Member
Picture of redrider1596
posted Hide Post
Is it happening with one particle ammo type? Maybe you have some 300 with a long OAL. The tip of the bullet could be dragging on the way up.
 
Posts: 248 | Location: Rio Grande Valley, TX | Registered: March 13, 2010Reply With QuoteReport This Post
Member
posted Hide Post
quote:
Originally posted by AKSuperDually:
The response from them is that 5.56 gen3 PMAGS aren't really designed for the blackout cartridge. They've not experienced any failures like I'm describing, and I should change out to the new 300 blackout PMAG. They stated the only failures they've seen are from split/damaged mags. I cannot find any evidence of spits/cracks/damage. These were bought new, loaded, stored with dust covers on....and failed in the first use.

I think I got a bad lot of springs, as I've not had these failures in the other pmags from a different lot and generation. I'm on my own to solve this it looks like.

I'll probably buy some aftermarket springs from elsewhere.

I've sent 2 or 3 emails back and forth with them...basically, this doesn't happen and there are no known "bad batches" or spring failures. They don't seem to believe me.

The solution is that I should purchase their new blackout mags. I may look around a bit.


F's sake. Could they not at the very least ask to send one of your mags in to look at it and let you know. Or at least have the common courtesy to tell you to F yourself after they pretend to look at it.


________________________________
 
Posts: 6637 | Location: One step ahead of you | Registered: February 10, 2009Reply With QuoteReport This Post
Not really from Vienna
Picture of arfmel
posted Hide Post
I'm disappointed in Magpul. I'd send them all the bad mags for replacement. Then sell the replacement magazines. And buy some dedicated .300BO magazines.




 
Posts: 21054 | Location: Young American Teen Club | Registered: January 30, 2007Reply With QuoteReport This Post
Go ahead punk, make my day
posted Hide Post
quote:
Originally posted by redrider1596:
Is it happening with one particle ammo type? Maybe you have some 300 with a long OAL. The tip of the bullet could be dragging on the way up.
That was my thought.

Op, how do the mags work with 5.56/223?
 
Posts: 36308 | Registered: July 12, 2008Reply With QuoteReport This Post
blame canada
Picture of AKSuperDually
posted Hide Post
quote:
Originally posted by redrider1596:
Is it happening with one particle ammo type? Maybe you have some 300 with a long OAL. The tip of the bullet could be dragging on the way up.
I think this is possible.


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
blame canada
Picture of AKSuperDually
posted Hide Post
quote:
Originally posted by arfmel:
I'm disappointed in Magpul. I'd send them all the bad mags for replacement. Then sell the replacement magazines. And buy some dedicated .300BO magazines.

I've become disappointed as well. I wasn't looking for anything more than some replacement springs or at least an explanation.

Here's some of the correspondence, basically...I don't think he believes me. I'm sure my small amount of business is of no consequence to them.

quote:
Phil,

That’s interesting. I am not sure how the rounds could be coming out of the top of the mags especially with the dust covers on…

The 300 BLK pmag uses the same springs as the standard AR/M4 30 round pmags. The major difference is the internal geometry of the 30 BLK pmag. It accommodates the wide variety of bullet profiles used in 300 BLK cartridges.

In addition to the performance gained by a dedicated mag, the PMAG 30 AR 300 B also offers a safer way to feed your 300 Blackout rifle. When using 5.56x45mm mags, the potential to chamber and fire a 300 Blackout round in a 5.56x45mm rifle with catastrophic results requires diligent ammunition management by the shooter. The PMAG 30 AR 300 B’s distinct rib design and smoother upper-half texture provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues. Along with optimized 300 Blackout performance, the PMAG 30 AR 300 B brings along all of the GEN M3 features such as our next-generation impact and crush resistant polymer, aggressive front and rear texture, an easily removable slim floor plate, a paint pen dot matrix for marking and identification, and a dust/impact cover.

Hope this helps. Let me know if you have any other questions.

Thanks,
Mike

Michael Pasciuti TECH SUPPORT SPECIALIST

MAGPUL INDUSTRIES CORP.
[P] 303.828.3460 x146 [F] 303.828.3469
mpasciuti@magpul.com
magpul.com | magpulcore.com

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From: Phil Larson Sr [mailto:phillip.r.larson@gmail.com]
Sent: Friday, August 11, 2017 1:29 PM
To: Pasciuti, Michael <mpasciuti@magpul.com>
Subject: RE: Magpul Case #49670 CRM:0012776

I haven’t found any cracks, and dust covers are used while stored.

Does your 300 B PMAG have a different spring? What is optimized in the mag that makes it better for the 300AAC?

From: Pasciuti, Michael [mailto:mpasciuti@magpul.com]
Sent: Friday, August 11, 2017 11:25 AM
To: Phil Larson Sr <phillip.r.larson@gmail.com>
Subject: RE: Magpul Case #49670 CRM:0012776

Phil,

Although you are able to run 300BLK in our AR/M4 PMAGS, the are not optimized for that cartridge. There is the potential for feed issues, depending on what BLK round you’re loading into the PMAGS.

Just out of curiosity, are you using the dust covers that come with the GenM3 pmags to keep on the fully loaded, stored pmags? The dust covers will not only keep the dust and debris out but, also keep pressure off the feed lips.

As another solution, since it seems as if you primarily shoot the 300 BLK, we have recently released our PMAG300 B GenM3 designed specifically and optimized for use with the 300 BLK cartridges. I would recommend picking up a few of those and giving them a try. Normally, the only time we see rounds being released or ejecting from the mags unintentionally, is due to a cracked or broken pmag, not a stiff spring.

Thanks,
Mike


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
Sigforum K9 handler
Picture of jljones
posted Hide Post
quote:
Originally posted by RHINOWSO:
quote:
Originally posted by redrider1596:
Is it happening with one particle ammo type? Maybe you have some 300 with a long OAL. The tip of the bullet could be dragging on the way up.
That was my thought.

Op, how do the mags work with 5.56/223?


Yeah, this. Have you tried it in a 5.56 gun?


_______________________________________________________________________
www.opspectraining.com

"Make it a shooting, and not a gunfight" LSP552 02/19/2011



 
Posts: 30723 | Location: Logical | Registered: September 12, 2004Reply With QuoteReport This Post
blame canada
Picture of AKSuperDually
posted Hide Post
The rounds were a mix...but mostly Sig Sauer Matchgrade (Elite Performance), 220 gr subsonic.

I'm loading 5.56 (winchester 55 gr) into them now to see if they have any issues.

On one of them, I pulled the spring out and stretched it a bit...which seemed to work for loading fine...but I'm assuming that it will do nothing over time. It's only been about 2 hours so far.


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
blame canada
Picture of AKSuperDually
posted Hide Post
So far 2 of the offending PMAGS have a "weak spot" about 3-6 rounds before the follower. With 556, the spring tension is enough to keep the rounds against the lips. With Sig Sauer Matchgrade, they are not, it's been hit or miss with Hornady Black.

The largest thing I'm drawing...is weight? I'm not unconvinced that the Sig Matchgrade wasn't dragging...I didn't grab calipers, but they seem longer and sharper than the Hornady Black. I don't have enough of the Sig ammo left to fill a 30 round mag.

I believe a stiffer spring is in order for these heavier rounds.


~~~~~~~~~~~~~~~~~~~~~~~~~
"The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagon, 1964
~~~~~~~~~~~~~~~~~~~~~~~~~~
"Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 Big Grin
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.GreatLandMissions.org
www.GLVS.org
 
Posts: 12617 | Location: On the Kenai River | Registered: June 24, 2007Reply With QuoteReport This Post
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