A little covid DIY project for those who don't like rubber magpuls and want something more like these for your MWS stanag mags.
You need: 3mm kydex, M3x10mm countersunk screws, saw / knife, heat gun, drill with 3mm - 5mm drills and countersink
Cut the kydex into squares (I made mine 58x58mm) either using a saw or simply scoring it multiple times with a knife and snapping it
Drill and countersink two holes along the center to match the screws on the base of the magazine. As the screws go into the mag at an angle it helps if you angle the countersink a bit too (as is done on the standard base plate)
Unscrew the standard base plate but keep pressure on it, slide the kydex square over it, and secure both with the new longer M3 screws
Heat the kydex square slowly with a heat gun, shielding the mag as much as possible (my mags all still seal afterwards... but this is is definitely not great for them)
While hot, quickly tighten the screws a little more to help pull the kydex into the tabs on the base plate, then bend over the flaps. I got the tightest bend by pressing all three sides in with some wood scraps for about a minute, before then letting it cool completely with the main sides pressed in a vice... its a bit tricky to get a sharp 90 degree bend into 3mm kydex, but you can always re-heat if you're not happy with the first result
Once cooled, unscrew and slide off the kydex again (keep pressure on the base plate and re-secure it with a screw...) to drill the hole for the gas fill valve. I tried drilling this hole at the start, but because the kydex warps when you heat and bend it I found it tricky to get the location right
You end up with a nice 3mm ledge on the back and front of the mag which helps to get a grip on it, and the kydex adds some extra drop protection too. Not sure what the extra strain will do to the screws in the long term, but I don't imagine its that bad.
Enjoy!