Why Were Drum Magazines Invented?

Because at a certain point making regular magazines bigger isn?t useful. They become too big and cumbersome. AK 100 round magazine So they tried drums because they?re less of an unholy bitch than a similar sized magazine. AK 74 round drum The problem with drums is that the coil springs always have issues that cause feed problems. They do work, and are generally more reliable than ridiculously large box magazines, but less reliable than reasonably sized box magazines. Read Also : Question : What is that little round dial at the North Pole?