| Year | 1939 |
| Weapon Type | Light Anti-Aircraft Gun |
| Origin & Designer | Germany/Gustloff |
| Numbers Produced | 60 |
| Crew | 4 |
| Calibre | 20mm (20x138B) |
| Elevation | -12° to +90° |
| Traverse | 360° |
| Breech | Gas Operated |
| Recoil | Buffer Spring |
| Gun Sight | Zeiss Ned 4A |
| Gun Mount | Triangular Platform |
| Carriage | Sd. Ah. 51 Two Wheeled Carriage |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.300mm (L/65) |
| Overall Length | 2.30m |
| Width | 1.81m |
| Height | 1.60m |
| Weight | Weight in Traction: 470 kg Weight in Action: 364 kg |
| Round Weight | HE: 136g AP: 0.1 kg |
| Muzzle Velocity | HE: 888 m/s AP: 1.050 m/s |
| Feed | 20 Round Magazine |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | 120 r.p.m. |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | 240 r.p.m. |
| Maximum Ceiling | 2.234m |
| Maximum Ground Range | 4.800m |
| Maximum Range | [@maximum_range] |
| Armour Penetration | 20mm @ 500m @ 30° |
| Traction | Motorised (3 ton Truck) |
| Variants | [@variants] |
| Notes | [@notes] |