The M1921 Thompson submachinegun used a detachable magazine- and could accept any of 4 different ones- a 20 or 30 round box magazine, or a 50 or 100 round drum magazine.
How many bullets can a 9mm baretta hold
It can hold 10 bullets amd it's semi-automatic.
It has a thirty round magizine or a 100 round drum
35
6
30
Six rounds.
11
poor llama...
Which model?
The magazine holds 17 rounds, +1 in the chamber. There are extended magazines available up to 33rds capacity, and even larger drum mags of variable reliability.
4 Types: M1921 M1927/8 M1 M1A1