| Year | 1938 |
| Weapon Type | Light Anti-Aircraft Gun |
| Origin & Designer | Germany/Rheinmetall |
| Numbers Produced | 52 |
| Crew | 7 |
| Calibre | 20mm (20x138) |
| Elevation | -20° to +90° |
| Traverse | 360° |
| Breech | Recoil Operated |
| Recoil | [@recoil] |
| Gun Sight | [@gun_sight] |
| Gun Mount | Triangular Platform |
| Carriage | Sd. Ah. 51 |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.300mm (L/65) |
| Overall Length | 4.08m |
| Width | 1.81m |
| Height | 1.60m |
| Weight | Weight in Action: 450 kg Weight in Transport; 751 kg |
| Round Weight | 0.136 kg |
| Muzzle Velocity | 888 m/s |
| Feed | 20 x Round Magazine |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | 180 r.p.m. |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | 2.200m |
| Maximum Ground Range | 4.800m |
| Maximum Range | [@maximum_range] |
| Armour Penetration | [@armour_penetration] |
| Traction | Motorized (Pavesi Truck) |
| Variants | [@variants] |
| Notes | The 20mm M1938 was a light anti-aircraft gun which was bought by the Greeks in 1938. It was designed and built by the German firm Rheinmetall and along with the 20mm M1930, were the standard light anti-aircraft guns of the Hellenic army. It had a similar performance to the earlier M1930, but was lighter in weight and because of this it was issued to cavalry formations. |