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Posted: 2/22/2021 5:44:09 PM EDT
[#1]
No need to rotate or replace anything. The springs will last longer than the mags.
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Posted: 2/22/2021 7:14:06 PM EDT
[#2]
You are actually causing wear by “rotating” your mags. So no it’s not ideal, just leave them loaded.
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Posted: 2/22/2021 10:12:29 PM EDT
[#3]
I have a set of range mags that I have been using for many many years, ten 20 round Pmags, six Lancer 20 round mags (not as old as the Pmags) and they function still like new.
Like someone said above, cycling wears springs our, not long term static loads. |
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Posted: 2/22/2021 10:34:08 PM EDT
[#4]
There have been more than a couple reports on the net of Pmag feed lips cracking after long periods of time being loaded. The springs should be completely fine.
I doubt it's something to get worked up over but I only leave my aluminum mags loaded for long periods. |
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Posted: 2/22/2021 10:55:39 PM EDT
[#5]
Quote HistoryQuoted: There have been more than a couple reports on the net of Pmag feed lips cracking after long periods of time being loaded. The springs should be completely fine. I doubt it's something to get worked up over but I only leave my aluminum mags loaded for long periods. I just learned thats what the dust covers are for lol, I used to just throw the in a drawer or in the trash, but I just tried one and they actually push that top round down a few mm to take the pressure off |
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Posted: 2/22/2021 11:45:38 PM EDT
[#6]
Good thing about a Pmag is that you use the spring in an d gi mag if you need to
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Posted: 2/23/2021 2:47:52 AM EDT
[#7]
Quote HistoryQuoted: I just learned thats what the dust covers are for lol, I used to just throw the in a drawer or in the trash, but I just tried one and they actually push that top round down a few mm to take the pressure off Quote HistoryQuoted: Quoted: There have been more than a couple reports on the net of Pmag feed lips cracking after long periods of time being loaded. The springs should be completely fine. I doubt it's something to get worked up over but I only leave my aluminum mags loaded for long periods. I just learned thats what the dust covers are for lol, I used to just throw the in a drawer or in the trash, but I just tried one and they actually push that top round down a few mm to take the pressure off They do take the pressure off of the very top of the feed lips, but according to Magpul themselves that is not what the dust covers are for. I don’t know if that is them not wanting to admit to a fault with polymer stress over time, or if 100 percent transparent. But I do know that is their official stance on their dust covers. |
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Posted: 2/23/2021 10:44:57 AM EDT
[#8]
Quote HistoryQuoted: They do take the pressure off of the very top of the feed lips, but according to Magpul themselves that is not what the dust covers are for. I don’t know if that is them not wanting to admit to a fault with polymer stress over time, or if 100 percent transparent. But I do know that is their official stance on their dust covers. Considering the only downside I've heard is the feel lips cracking (and thats literally the first time I heard that) and the dustcover does take the pressure off it seems good for me (especially after putting one). |
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Posted: 2/23/2021 10:48:52 AM EDT
[#9]
 MAGPUL PMAG - Loaded With Ammo for 12 Years TEST! (No Dust/Impact Cover) |
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Posted: 2/23/2021 11:05:32 AM EDT
[#10]
Quote HistoryWell, there you have it. Gen 1 = Gen 2. = Gen 3. Whats the big difference between them again? |
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Posted: 2/23/2021 11:08:10 AM EDT
[#11]
My objection to Pmags is that if they get abused, like really heated up in a class or something, they tend to crack along the spine. People argue that at least they fail catastrophically and let you know when it's time to trash them. GI mags may be damaged but not red flag you that they're bad. Still, I'm old school and I mistrust polymer for long term durability. There are aluminum mags that are decades old and still functioning even though they have been in use. I don't know that we can say the same about Pmags. (Loaded but in storage doesn't count as "in use" as far as I'm concerned).
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Posted: 2/23/2021 11:25:42 AM EDT
[#12]
I’ve seen my fair share of cracked Pmags but don’t think they were from heat.
I don’t recall seeing a black Gen2 crack and the only Gen3s I’ve seen crack have been 40 rounders, many with extensions, that get dropped a lot in competition. |
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Posted: 2/23/2021 11:42:53 AM EDT
[#13]
The compression from loading and shooting causes spring issues. Constantly loaded is not an issue with good quality parts
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Posted: 2/23/2021 11:43:38 AM EDT
[#14]
Quote HistoryQuoted: There have been more than a couple reports on the net of Pmag feed lips cracking after long periods of time being loaded. The springs should be completely fine. I doubt it's something to get worked up over but I only leave my aluminum mags loaded for long periods. I have never experienced this with gen2. And yes, plenty of use cases for it to have happened if it would |
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Posted: 2/23/2021 11:55:32 AM EDT
[#15]
Quote HistoryQuoted: I have never experienced this with gen2. And yes, plenty of use cases for it to have happened if it would I've never had it happen. It has happened to people with the colored Gen 2 mags more than once that I've seen on various forums. |
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Posted: 2/23/2021 12:39:36 PM EDT
[#16]
Quote HistoryQuoted: Well, there you have it. Gen 1 = Gen 2. = Gen 3. Whats the big difference between them again? Quote HistoryQuoted: Well, there you have it. Gen 1 = Gen 2. = Gen 3. Whats the big difference between them again? LINK |
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Posted: 2/23/2021 1:10:06 PM EDT
[#17]
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Posted: 2/23/2021 5:45:13 PM EDT
[#18]
Technically yes, springs will lose tension when left compressed. This phenomenon is known as "creep":
https://idcspring.com/spring-lose-tension-when-compressed/ With that said, the actual amount of creep that occurs is so small, that you can safely ignore it: if all metals creep (and springs do too), then how long before the spring in a fully loaded a magazine is significantly softer? For 316 stainless steel at high temperature (~550C) you can expect a 1% plastic deformation (1% is a commonly used failure criteria) from a reasonably medium-high constant stress (160MPa) after a little over a year (actually 10,000 hours). Since the creep is exponentially dependent on temperature through an Arrhenius relationship to activation energy of the creep mechanism, at room temperature you can expect this length of time to be a factor of about 1018 longer (that’s about 3.7 million trillion years, I think). So, I think it’s safe to say that creep isn’t softening your magazine springs. https://www.reddit.com/r/askscience/comments/sfyv8/do_springs_lose_their_springiness_when_left/ |
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