I bought 50+ of the original MagPul's when they first came out. A few 20's and a bunch of 30's (I do alot of P-dog huntin'). All of my 30's are the 'windowed' version.
It's obvious that you have much more knowledge and experience with the progression/developement of these mags over time and I was wondering what changes (design and materials) have taken place from the initial MagPuls to these current models. It's clear that some changes have been made as I believe that your reference to Gen M3 likely indicates that at least 3 notable changes have taken place over the years.
I ask because if there were reliability/strength/etc. issues found with the first run of these mags (of which I own), I'd certainly be interested and inclined to acquire a # of the most current offering. Do they still even offer a 'windowed' version of their newest offerings....?
I've fired thousands of rounds from my MagPuls without issue and would have no problem in continuing to use them for sporting purposes, but my real concern obviously has more to do with my the most prudent choice for a personal defense mag (both in 20 and 30 rd.).
Thanks in advance......

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May 15th:
Again.....I just naturally thought that we could post questions in this section rather than just placing an order here. I thought that you might have the answer to my above questions that could help me to decide if I need to purchase these newest generation MagPuls in order to feel a bit safer and confident in using them.
I will go online and seek out the information that I thought you might know something about, so no worries. I expect that the 'upgrades' have been beneficial enough that I'd likely order the newest MagPul offerings in bulk as I do most everything.
Thanks anyway and if you're interested in what changes have taken place over these many years with these MagPul mags, I'll gladly share that information with you after studying up on the subject..

. Since we're all from the same HW family, whatever I can do the help other members to make a more informed decision.....I certainly will.
Thanks anyway....!