She is a kindergarten teacher at Seishou Academy under the elementary department. Her name "Thompson Sensei" was obviously derived from the M1928. Type: Submachine gun Place of origin: United States Specifications Weight10.8 lb (4.9 kg) empty (M1928A1) 10.6 lb (4.8 kg) empty (M1A1) Length33.5 in (850 mm) (M1928A1) 32 in (810 mm) (M1/M1A1) Barrel length10.5 in (270 mm) 12 in (300 mm) (with cutts compensator) Cartridge.45 ACP (11.43 × 23 mm) ActionBlowback, Blish Lock Rate of fire600–1500+ rpm, depending upon model Muzzle velocity285 m/s (935 ft/s) Effective range50 metres (160 ft) Feed system20-round stick/box magazine 30-round stick/box magazine 50-round drum magazine 100-round drum magazine (M1 and M1A1 models do not accept drum magazines)