Kriss Vector vs Thompson Submachine Gun

2009–present

1921–Present

Unknown

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

406mm (16 in) stock folded, 620mm (24.4 in) extended

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

140mm (5.5 in) SMG, 406mm (16 in) civilian carbine

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

2.7 kg (5.95 lb) .45 ACP, 2.5 kg (5.5 lb) 9mm

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

13-30 rounds depending on caliber (Glock magazine compatible)

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

Delayed blowback, closed bolt — Super V recoil mitigation

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

Selective fire (safe, semi, 2-round burst, 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