Yeah, I'm gonna do the Para-cord dealio after next game on my g36c mags. I'll get an m4 variant soon, but since my mags are fragile, I shouldn't drop them, which is where mag pulls will also come in use.. I can hold the cord till I can toss it safely or put it away.
And remember I said "Shouldn't"... I still do, which is why they'll break in no-time.. so those magpulls are well needed by me. ;-)