Heckler & Koch MP7 vs SIG MPX

2001–Present

2015–present

~50,000 estimated

Unknown

418 mm (16.5 in) stock retracted, 638 mm (25.1 in) stock extended

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

180 mm (7.1 in)

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

1.5 kg (3.3 lb) empty

2.67 kg (5.9 lb) 4.5-inch barrel

20, 30, or 40 rounds

10, 20, or 30 rounds — translucent polymer

Gas-operated, rotating bolt

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

Single-stage

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

Flip-up iron sights, Picatinny rail for optics

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