| 20mm Oerlikon antiaircraft gun model 1928 |
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| Specifications |  |
| Calibre | 20mm |
| Barrel length | 2210mm |
| Weight in action | 66.74kg |
| Vertical field of fire | -10° to +75° |
| Horizontal field of fire | 360° |
| Magazine capacity | 60 rounds |
| Shell weight | 0,123/0,119 kg |
| Muzzle velocity | 830m/s |
| Rate of fire | 465-480rpm |
| Max vertical range | 1100m |
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