long term ammo storage question

[mosin46]

i have heard that long term ammo storage in P MAGS can distort them giving reliability issues way down the road. anyone have any real evidence of that or just another web fable? hear mag trash talk all the time: P mags are shit,P mags are the only thing to use. same story with aluminum mags: they suck,they are wonderful. quality would matter. all my metal are palmetto/BCM-both "new" surplus i think. have brownell's and a bunch of P mags as well. thanks for any input.

 

[SLG]

Magpul told me in person that the Pmags would deform their lips over time, which is why they came up with the little cap that comes with the mags. I don't have much recent info on them, as my friends at magpul have jumped around a fair bit, but at the time I was told this, they thought that the mags should be good for a "short period" without putting the cap on. I think that short period is now a somewhat longer period, but I'm sorry, I don't have a definite answer on that.

 

[ForgeValley]

I did have a Gen 2 Pmag stored with 30 rounds of 5.56 and it cracked a feed lip off. No problem that I have had first hand with the Gen 3. Pmag and Lancer are still my go to AR mags.

 

[Deleted member 113831]

My back up mag for my duty rifle has been fully loaded for over a year now, (Gen2 mag) with no cap on it. I qualified with it last month and it ran fine. Just my recent experience, a sample of one. Though I only keep 28 rounds in it. Maybe that is the difference.

 

[mosin46]

thanks guys. probably just put LT ammo in metal. aluminum can't seem to find quality steel.

 

[whatsupdoc]

Always wondered what the reason was for the magpul covers.
Maybe magpul should try steel lips on their mags if there is an issue with the lips.

 

[SLG]

I use magpul mags from time to time, but my favorite non GI mags are the Gen 2 ARC mags from TangoDown. Pretty awesome mags, and not anything like the gen 1's.