Heckler & Koch MP5 vs Sterling L2A3

1966–Present

1953–1988

~2,000,000 estimated

Over 400,000

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

481mm (18.9 in) stock folded, 690mm (27.2 in) extended

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))

198mm (7.8 in)

2.54 kg (5.6 lb) empty (MP5A3)

2.72 kg (6 lb) empty, 3.45 kg (7.61 lb) loaded

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

34 rounds — curved magazine for reliable feeding

Roller-delayed blowback, closed bolt

Blowback, open bolt — helical bolt grooves for debris clearance

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

Selective fire (safe, semi, full auto)

Rotary drum rear, hooded front post

Protected front post, flip L-shaped rear aperture (100m/200m)