FMK-3 vs Heckler & Koch MP5

1974–1993

1966–Present

Unknown

~2,000,000 estimated

605 mm (stock folded) / 805 mm (stock extended)

680 mm (26.8 in) stock extended, 550 mm (21.7 in) stock retracted (MP5A3); Varies significantly depending on variant.

200 mm

115 mm (4.5 in) standard, various lengths depending on variant (e.g., MP5K: 102 mm (4.0 in), MP5SD: 146 mm (5.7 in))

3.05 kg

2.54 kg (5.6 lb) empty (MP5A3)

40 rounds

15, 30 rounds standard; 10, 20, and 40 round options available

Blowback, telescoping bolt

Roller-delayed blowback, closed bolt

Single-stage

Single-stage military trigger; SEF (Safe, Semi-automatic, Full-automatic) or Navy trigger groups available with burst-fire options

Fixed front post and flip-up rear aperture

Rotary drum rear, hooded front post