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AR15.COM
10/5/2007 12:50:33 PM EDT
I searched and found no info on this, so I'll ask:

I've got some PMAGS and the info on them says the mag cover is for long term storage to pevent the feed lips from spreading.

Just how long is long term? How long can they safely be stored without the covers?
10/8/2007 1:19:06 PM EDT
[#1]
i dont think anybody knows the answer to thatn YET. i havent heard of anybody having problems storing the mag without the cover installed with rds in it. the cover was just a 'just in case' addition as far as anyone knows, unless magpul knows something we dont jk
10/8/2007 4:31:24 PM EDT
[#2]
Post I made in another forum.  Change seven months to ten.

Here's the deal, PMAG's are still considered a new product for us. We realize that they need to be feilded for at leat a year before people can truely trust these, even then there will be disbelievers and that's fine. The statement made by Magpul months ago about the PMAG being disposable still stands. Don't let this sway or concern you though. USGI aluminum mags are also disposable. Back when the AR was first introduced to the AF and Army the mags we shipped to Vietnam in crates, loaded and left on the jungle floor when emptied. My dad has told me this story many a times.

All of this said, I have a PMAG with 7k plus rounds, fired on FA, suppressed dumped over and over again. No malf's, no melting. There are other LE guys and Mil that are reporting five-figure round counts (10k plus). Last week I recieved an email from a young soldier in Iraq that was estatic that he had two kills with his M4 while running PMAG's. All other sources that are running PMAG's in country are happy with the results thus far.

Side note, don't let the fact that we designed a impact/dust cover make you think that the lips will bulge over time. I've got an 0107 PMAG that has been loaded on my desk without the cover for the last seven months. I check it every once and awhile for feed lip creep. Thus far the mag is retaining its dementions and no creep is present. If the mag is going to be stored for a long period of time, years on end, the cover is a good idea to prevent creeping. The PMAG has not been around long enough to see if creeping happens and we have not seen it yet.
10/10/2007 10:05:02 AM EDT
[#3]

Quoted:
Post I made in another forum.  Change seven months to ten.

Side note, don't let the fact that we designed a impact/dust cover make you think that the lips will bulge over time. I've got an 0107 PMAG that has been loaded on my desk without the cover for the last seven months. I check it every once and awhile for feed lip creep. Thus far the mag is retaining its dementions and no creep is present. If the mag is going to be stored for a long period of time, years on end, the cover is a good idea to prevent creeping. The PMAG has not been around long enough to see if creeping happens and we have not seen it yet.


This is the info I was looking for. While I understand that you're not saying feedlip creep is impossible, the difference bewteen a few weeks and several months is the definition I was looking for.

I was looking at whether it'd be o.k. to load up my PMAGS and stick them in my chest rig without the covers, and not worry about them. I typically use up the ammo within 6 month, and would plan to cycle to another set of mags after these were emptied.
10/11/2007 4:32:22 PM EDT
[#4]

Quoted:
Post I made in another forum.  Change seven months to ten.
<snip>
I've got an 0107 PMAG that has been loaded on my desk without the cover for the last seven months. I check it every once and awhile for feed lip creep.


Thanks, I was also looking for that info. Great to know that you all prefer to err on the side of caution. Keep up the good work



Thus far the mag is retaining its dementions and no creep is present.


Maybe you should send the mag to a better shrink, then - dementia is treatable
Or maybe it would help if there was a creep present
10/29/2007 6:08:34 PM EDT
[#5]
Sounds good overall.


Any testing in repetitive cooling/heating cycles?


You'll have to come up with an arbitrary number of cycles first and work from there.  

I figure:

-40F to 50f

50F to 100F

100F to 160F(hot ammo box in Humvee in Iraq?)

Then a big one from 20F to 120F


I'm sure you have something like this going already.



They will "fail" at some point and you want them to, in order to make sure that "fail" point is beyond the assumed life expectancy out in the field.
On a sidenote:  is it "safe" to buy PMAGs yet without wondering about having to send them back?
5/3/2008 12:14:22 PM EDT
[#6]
7KOPPER, any updates?

Thanks!
5/3/2008 4:44:19 PM EDT
[#7]

Quoted:
7KOPPER, any updates?

Thanks!


It's Dr. Drake now... but I'd like to know as well.



TS
5/6/2008 5:35:33 PM EDT
[#8]

Quoted:
. . . Last week I recieved an email from a young soldier in Iraq that was estatic that he had two kills with his M4 while running PMAG's.


Does this count as animal testing?

5/6/2008 7:17:32 PM EDT
[#9]
... so I can conclude that most efforts to kill a PMag are not going to work, and that they still ouperform anything else out there.  Check.  Just need mine to arrive in the bleeding mail.