>>6333897He's right you know.
The drum mags are much larger and don't store as well as similar stick mags. They also have spring problems. The 35 drum for instance sometimes needs lube if it's been abused and the springs on them deteriorate fast.
Four 18 stick mags take up the same space as a 36 drum because the rotation shit for the drums takes up a lot of space.
Pro-Tip: Just tape two 18-mags (or whatever you feel like using) together so the spare is facing down. Reload the spare mag with darts off the ground, flip when the mag being used is empty, repeat step one.