Top bit of kit,
Goes against the skillies who tell you to have the mags uppermost in your pouches, great if you want to loose the top round!
I've always gone with mags down so the magpuls have taken over from my harry black and paracord improvisation!
The SASC have always preached never to put magazines top down to prevent damage to the lips of the mag.
I am SAA and always place them top down, so as never to loose the first round.
Going back to the gucci magplus bit of kit, way back on Telic 1, I acquired a similar piece of kit from the Yanks. It was a clear rubber cover that fitted over the top of the mag, it easily flipped off with your thumb prior to fitting the mag to your weapon, and as well as keeping the top round in place it kept sand out, fantastic!!