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.

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.

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.

~~~~~~~~~~~~~~~~~~~~~~~~~
"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 Reagan, 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
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.rikrlandvs.com

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.

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 Reagan, 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
~~~~~~~~~~~~~~~~~~~~~~~~~~

www.rikrlandvs.com

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?