| Year | August 1938 |
| Weapon Type | Light Anti-Aircraft Gun |
| Origin & Designer | Germany/Rheinmetall |
| Numbers Produced | 17.589 |
| Crew | 7 |
| Calibre | 20mm (20x138) |
| Elevation | -20° to +90° |
| Traverse | 360° |
| Breech | Recoil Operated |
| Recoil | [@recoil] |
| Gun Sight | Flakviser 38 |
| Gun Mount | Triangular Platform |
| Carriage | Sd. Ah. 51 |
| Trailers | [@trailers] |
| Gun Shield | 5mm |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.300mm (L/65) |
| Overall Length | 4.08m |
| Width | 1.81m |
| Height | 1.60m |
| Weight | Weight in Traction: 751 kg Weight in Action: 405 kg |
| Round Weight | 0.136 kg (HE - 2cm Patr. Sprgr. L’spur) 0.1 kg (AP - s.PZ.B.41) |
| Muzzle Velocity | 888 m/s (HE) 1.050 m/s (AP) |
| Feed | 20 Round Box Magazine |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | 180 r.p.m. |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | 450 r.p.m. |
| Maximum Ceiling | 2.200m |
| Maximum Ground Range | 4.800m |
| Maximum Range | [@maximum_range] |
| Armour Penetration | 20mm @ 500m @ 30° |
| Traction | Motorised (Protze Kfz 69 & Sd.Kfz 10) |
| Variants | [@variants] |
| Notes | The Flak 38 was designed to replace the Flak 30. It had a higher rate of fire and was more reliable than its predecessor but the carriage was similar to the Flak 30. The Flak 38 served right through World War Two and Germany’s primary light flak gun. |