FN MAG / M240 vs HK MP5SD

1958–present

1974–present

Over 200,000

Unknown

1,263mm (49.7 in)

790mm (31.1 in) stock extended

630mm (24.8 in) standard

146mm (5.7 in) — ported, inside suppressor

12.5 kg (27.6 lb) M240B with bipod

3.5 kg (7.7 lb)

M13 disintegrating link belt, typically 50 or 100 rounds

15 or 30 rounds detachable

Gas-operated, open bolt

Roller-delayed blowback, closed bolt

Full auto only

Selective fire (safe, semi, full auto or 3-round burst)

Adjustable iron sights, Picatinny rail for optics

Hooded front post, adjustable diopter rear