Looking at the above document, it appears that the SEALs are buying a bunch of HK mags.
Not being familiar, it would seem that the P-Mag would be a decent choice for the maritime environment, since corrosion is a major concern. Is the HK mag comparable to the P-Mag in overall reliability/performance?
I think the main reason why a SEAL would rather carry PMAGs over H&K Mags would be cause of weight.
I also bet those mags from H&K were nice and cheap compared to Pmags.
Everything with an “HK” stamp on it appears to be gold-plated.
Personal experience only: I think that they’re about equal in terms of overall reliability. I give the edge to the Pmag.
However, presuming equivalent performance, or near enough, you can spend $15 ea. on windowless Pmags, or spend around $45+ ea. on HK mags that weigh more and require more attention paid to keeping them corrosion free.
It’s all in how you conduct your costs/benefits analysis.
I wonder why they dont get the Emags. 
Slippery when wet?
I could be wrong, but I’m willing to guess that the reason they chose the HK mags was that HK is a vendor that their familiar with. Its just logistics. I agree that Pmags would be a better choice. 1/3 the cost, 1/2 the weight and just as reliable.
If they are running 416’s, PMAGs won’t work.
I’d think the steel HK mags would be as or more slippery than the E-mag.
Yes.
P mags are not NATO compliant. That is a factor.
Also, the HK Mags have an NSN making them easier to order through thet system.
The HK416 mag is nice and all but in my experience in fast cyclic rate guns (10.5" guns suppressed) is that they only last a thousand rounds or so and then start not locking the bolt to the rear when run dry. Not much longer after that they just quit feeding. I haven’t had this problem with PMAGs, USGI aluminum mags or Lancer L5 mags. With a 20" gun or a piston gun (cycles much slower) the HK416 mag would probably work with it forever.
It’s difficult to contribute much to these threads without going against established Magpul corporate policy of not releasing information about our customers. As I posted in another recent thread, public information about most military equipment purchases is available if anyone cares enough to dig for it. CounTeR proved that…
Congrats on the sale.
we did not choose the hk mag. from my experience most operators don’t want, like or carry them. too heavy and they have had reliability issues. pretty much everyone i know, myself included, would roll pmags if given a choice. however, since upper ranking members would rather listen to some civilian at craine tell us what we need based on the amount of money they stand to make off the deal rather than the operator…well, we gots what we gots.
We’re working on that, trust me. If you guys need anything, feel free to shoot me an email directly: nick @ magpul.com (no spaces) or call 1.877.4MAGPUL and ask for Nick.
Were the GI spec mags really THAT bad?
Some people never had a problem with USGI mags. I’m not one of those people.
Why so many versions of PMags?
Are they being redesigned so people just keep buying them to have the latest and greatest or whats the deal?