Don't you love it when articles give incorrect information to their readers:
"Switching between a drum magazine and a box magazine required an extra set of tools. To load a drum magazine also required the user to have a special tool that would lock the bolt back to the rear. And, unlike spring-loaded box mags that were already under tension, reloading a drum magazine required a tool to rotate the spring in the magazine enough to put the rounds under the necessary tension.
Worst of all, if you lost any of the tools needed to reload the weapon, you would be hard-pressed to actually be able to do it without assistance".