Type | General purpose machine gun |
Place of origin | West Germany |
Service history |
Used by | See Users |
Production history |
Designer | Heckler & Koch |
Designed | 1961 |
Manufacturer | Heckler & Koch |
Variants | See Variants |
Specifications |
Weight | HK21: 7.92 kg (17.46 lb)
HK21A1: 8.30 kg (18.3 lb)
HK11A1: 7.70 kg (17.0 lb)
HK21E: 9.30 kg (20.5 lb)
HK11E: 8.15 kg (18.0 lb)
HK23E: 8.75 kg (19.3 lb)
HK13E: 8.00 kg (17.6 lb) |
Length | HK21: 1,021 mm (40.2 in)
HK21A1, HK11A1, HK11E, HK23E, HK13E: 1,030 mm (40.6 in)
HK21E: 1,140 mm (44.9 in) |
Barrel length | HK21, HK21A1, HK11A1, HK11E, HK23E, HK13E: 450 mm (17.7 in)
HK21E: 560 mm (22.0 in) |
|
Cartridge | HK21, HK21A1, HK11A1, HK21E, HK11E: 7.62x51mm NATO
HK23E, HK13E: 5.56x45mm NATO |
Action | Roller-delayed blowback |
Rate of fire | HK21, HK21A1: 900 rounds/min
HK11A1, HK21E, HK11E: 800 rounds/min
HK23E, HK13E: 750 rounds/min |
Muzzle velocity | HK21, HK21A1, HK11A1, HK11E: 800 m/s (2,625 ft/s)
HK21E: 840 m/s (2,755.9 ft/s)
HK23E, HK13E: 910 m/s (2,985.6 ft/s) (using the SS109 cartridge) |
Effective range | 100–1,200 m sight adjustments |
Feed system | M13, DM6, DM1 ammunition belt, 20-round detachable box magazine (from the G3) or 50-round drum |
Sights | Rear rotary diopter drum; hooded front post |
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