skos:altLabel | - Multiple
- HK 21
- HK11
- HK11 A1
- HK11/21
- HK11A1
- HK21
- HK21 machine gun
- HK21A1
- HK21E
- HK23E
- HK25
- Heckler & Koch HK11
- Heckler & Koch HK21#HK25
- Heckler & Koch HK21#Users
- Heckler & Koch HK21#Variants
- Heckler & Koch HK21E
- Heckler & Koch HK23E
- XM262
- m/968 Metralhadora Ligeira
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