SIG MPX vs Thompson Submachine Gun

2015–present

1921–Present

Unknown

~1,500,000 units (World War II peak production) and limited post‑war runs

425mm (16.7 in) stock folded, 610mm (24 in) extended

762 mm (30.0 in) with stock extended; 660 mm (26.0 in) with stock folded (M1A1)

114-203mm (4.5-8 in) — multiple configurations

254 mm (10.0 in) standard; 305 mm (12.0 in) for some export models

2.67 kg (5.9 lb) 4.5-inch barrel

4.4 kg (9.7 lb) empty (M1); 3.9 kg (8.6 lb) empty (M1A1)

10, 20, or 30 rounds — translucent polymer

20‑round box, 30‑round box, 50‑round drum, 100‑round drum (rare)

Gas-operated, short-stroke piston, closed bolt — rifle-derived

Simple blow‑back, open‑bolt, selective‑fire; rate of fire 600–1,250 rpm depending on model

Selective fire (safe, semi, full auto on military models)

Two‑stage trigger: semi‑automatic (first pull) and fully‑automatic (second pull) on early models; later models use a single‑stage full‑auto trigger with a selector switch

Flip-up iron sights, full-length MIL-STD-1913 rail

Rotary drum rear sight with 50, 100, 200, 300 yard settings; hooded front post; optional adjustable rear sight on later police variants