RPK vs Ultimax 100

1961–Present

1986–present

~10,000,000+ units (including all variants and licensed copies)

Approximately 80,000

940 mm (37.0 in) with stock extended; 860 mm (33.9 in) with stock folded (RPK-74M)

1024 mm

415 mm (16.3 in) standard; 460 mm (18.1 in) RPK-74 variant

508 mm

4.8 kg (10.6 lb) empty (RPK); 4.5 kg (9.9 lb) empty (RPK-74)

4.9 kg

30‑round AK‑type box magazine standard; 40‑round box (RPK‑74); 75‑round drum (optional); 100‑round drum (rare)

100 rounds

Long‑stroke gas piston, rotating bolt, closed‑bolt operation; reinforced bolt carrier group for sustained fire

Gas-operated, constant recoil

Single‑stage military trigger with selector for safe, semi‑automatic, and fully automatic fire

Single stage

Adjustable rear leaf sight (100‑1000 m); hooded front post; optional night sight dovetail

Adjustable front post, flip-up rear