AK-47 vs Heckler & Koch HK91

1949–Present

1977–2000

Approximately 100,000,000+ units (including all variants and licensed copies)

~250,000 estimated

870 mm (34.3 in) with stock extended, 640 mm (25.2 in) with stock folded (rifle with folding stock)

1,020 mm (40.2 in) with stock extended

415 mm (16.3 in) standard, 375 mm (14.8 in) for AKM shortened models

508 mm (20.0 in)

3.47 kg (7.7 lb) empty, 4.3 kg (9.5 lb) loaded with 30‑round magazine

4.3 kg (9.5 lb) empty

30 rounds standard detachable box, 10‑round magazine for civilian use, 40‑round drum, 75‑round drum (rare)

20 rounds standard, 10‑round low‑profile magazines available for restricted markets

Gas‑operated, long‑stroke piston, rotating bolt, closed bolt

Roller‑delayed blowback, closed bolt

Single‑stage military trigger with selector lever for safe, semi‑auto, and full‑auto

Single‑stage semi‑automatic trigger with manual safety lever

Adjustable rear notch (range 100–1000 m) and hooded front post; some models equipped with side‑mounted night sights

Adjustable rotary drum rear sight (100‑800 m) and hooded front post; optional telescopic sight mounting rail on receiver cover