If there’s a similarity that Star Wars battlefront, helldivers 2,, starship troopers: extermination, every fallout game, space marine 2, Halo, duke nukem, GTA, even COD all share, it’s that none of the guns featured in these games have slings. Historically, the use of belts, bags, and slings by foot-soldiers is a recent phenomenon.
I don’t know what caused this, but most modern infantry use that shit to make transporting their supplies, equipment, and weapon(s) around a shitload easier. It’s such a subtle change too. You don’t notice how much the other aspects of human violence have changed outside of the tech used until you notice that soldiers literally hold rifles differently compared to a century ago and in more positions for increased coverage and mobility.
I don’t even think the devs of actual military simulators like arma and squad caught onto a change this drastic yet subtle…