Check at Bullseye Sports out of London, they have E-Lander's that are steel and pinned (riveted to 5 rounds) and they work pretty good.
Agreed, they are quality mags, but they are pinned real tight to 5 rounds, so they won't engage on a closed bolt. Also have C Products metal mags, which are just fine, although maybe not quite as robust as E-Landers, except that the more recent pinned ones are like the E-Landers; won't insert on a closed bolt. They used to be crimped - I have a bunch of those - and they were fine; they'd load "5 1/2" rounds, so you could do a tactical reload on a closed bolt.



























