Overall length of gun with stock: 33 3/4”.
Overall length of gun without stock: 25 1/4”.
Weight (without magazine): 10 lbs.
Weight of gun with drum magazine, loaded:
50 rounds: 14 3/4 lbs.
Weight of gun with box magazine, loaded
20 rounds: 11 1/4 lbs.
30 rounds: 11 3/4 lbs.
Barrel length without Cutts compensator: 10 1/4”.
Barrel length with Cutts compensator: 12 1/2”.
Rifling, right-hand one turn in 16”.
Rate of fire, semi-automatic (single-aimed shots) per minute: Up to 100.
Cyclic rate of fire, fully automatic (approx.) 700 rnds. per min.
Been a while since I read the book but that total weight of fifty pounds for gun and drum sticks in my mind.