AK4D vs B36A4

1998–Present

2012–Present

~2,500 units (estimated)

~20,000 estimated

950 mm (37.4 in) with stock extended, 770 mm (30.3 in) folded

999 mm (39.3 in) stock extended / 738 mm (29.1 in) stock folded

508 mm (20 in) standard, 406 mm (16 in) for AK4 base model

480 mm (18.9 in)

3.45 kg (7.6 lb) empty, 3.75 kg (8.3 lb) with bipod and optics

3.63 kg (8.0 lb) empty

30 rounds standard STANAG, 20/40 round magazines compatible

30 rounds standard, 20/100 round options available

Short‑stroke gas piston, rotating bolt, closed‑bolt operation

Gas-operated, short-stroke gas piston, rotating bolt

Two‑stage military trigger, adjustable pull weight for designated‑marksman role

Single-stage, with two-stage available on some variants

Standard AK4 iron sights (adjustable rear aperture, hooded front post) plus provision for 4×24 telescopic sight and optional flip‑up night sights

Integrated 3x optical sight (Zeiss RSA-S) with backup iron sights or optional Picatinny rail-mounted optics