OK now I know more about drum mags than I did before. I admit the first thing I thought of was a Luger Schnellfeuer but thought it unlikely that a homeboy would be using one.
I’m not a fan but did at one time in my career carry a C-Mag 100 round drum when threat was high and violence of action was required to travel certain roads. 1 in the weapon an 4 spares in a bag on the floor.
Today Surfire makes a very good 60 round capacity magazine that packs easier than the hooter mags from C-Mags aka the Beta Mag !
Stay safe !