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SIG MPX vs Sten Mk II
Side-by-side technical comparison
SIG MPX
Submachine GunsIn production
Sten Mk II
Submachine GunsDiscontinued
Overview
Spec
SIG MPX
Sten Mk II
Production
2015–present
1941–1945
Units produced
Unknown
Over 4,600,000
Specifications
Spec
SIG MPX
Sten Mk II
Overall length
425mm (16.7 in) stock folded, 610mm (24 in) extended
762mm (30 in)
Barrel length
114-203mm (4.5-8 in) — multiple configurations
197mm (7.75 in)
Weight
2.67 kg (5.9 lb) 4.5-inch barrel
2.95 kg (6.5 lb) empty, 3.7 kg (8.2 lb) loaded
Magazine capacity
10, 20, or 30 rounds — translucent polymer
32 rounds — side-mounted (MP40-compatible design)
Action type
Gas-operated, short-stroke piston, closed bolt — rifle-derived
Blowback, open bolt
Trigger type
Selective fire (safe, semi, full auto on military models)
Selective fire (safe, semi, full auto — Mk II) or full auto only (some variants)
Sights
Flip-up iron sights, full-length MIL-STD-1913 rail
Fixed front post, fixed peep rear — crude but functional
Calibers
SIG MPX
Sten Mk II