| name | image | Ammunition | type | Barrel length (m) | Caliber (m) | Crew | date designed | date end service | date start service | Engine | Height (m) | Country | continent | place of origin | Initial speed (m/s) | Length (m) | mass (kg) | Number built | Operational range (m) | Rate of fire (round/minute) | Speed (m/s) | Width (m) | Military Vehicle |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Heckler & Koch HK21 |  | Firearm | 0 | 0 | 1961 | 1961 | Germany | Europe | Germany | 1 | 8 | 1,961 | 1 | 900 | 800 |