I thought this was a "newbie" enough of a question to post it here. I'm a bit confused by the PMAGs available; namely, Gen 2 and Gen 3 (5.56) and the "window" magazine option. Forgive therefore the newbie questions. Would it be wise to go with Gen 3 PMAGs over PMAG Gen 2. I see some sales from time to time on Gen 2 and I think, "Dang, I should get those" but then I read about the updates to the Gen 3 and think...calm down there, cowboy. And then I see the mags with windows in them and wonder if I should get those over the non-window mags. I'm thinking that in any real-world scenario, would I even bother to look at those windows? On the range, I shoot through a magazine and replace it. Thanks for any advice