| Year | March 1940 |
| Weapon Type | Multi-Barrelled Light Anti-Aircraft Gun |
| Origin & Designer | Germany/Mauser |
| Numbers Produced | 3.768 |
| Crew | 8 |
| Calibre | 20mm (20x138) |
| Elevation | -10° to +100° |
| Traverse | 360° |
| Breech | Recoil Operated |
| Recoil | [@recoil] |
| Gun Sight | Flakviser 38/40 |
| Gun Mount | Triangular Platform |
| Carriage | Sd. Ah. 52 |
| 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: 2.218kg Weight in Action: 1.451 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 | 4 x 20 Box Magazines |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | 800 r.p.m. |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | 1.800 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 Flakvierling 38 was a four barrelled (quadruple) version of the Flak 38. The usefulness of 20mm calibre rounds was beginning to wane with the introduction of faster low flying aircraft. This version could achieve a rate of fire which made up for the lack of punch. Each barrel was fed by a 20 round magazine which made it lethal not only to low flying aircraft but ground targets too. |