[–] KosherHiveKicker [S] 0 points 2 points 2 points (+2|-0) ago (edited ago)
It's much easier than I thought. You don't even need to modify the internal trigger.
Mount a mail order "GAT Trigger Crank" and use a 50 round drum magazine.
Plus .. the crank trigger would explain the funky, sluggish start to the mag dumps caught on video.