| Year | 1942 |
| Weapon Type | Light Anti-Aircraft Gun for Pack Traction |
| Origin & Designer | Germany/Mauser |
| Numbers Produced | 180 |
| Crew | 4 |
| Calibre | 20mm (20x138) |
| Elevation | -20° to +90° |
| Traverse | 360° |
| Breech | Recoil Operated |
| Recoil | [@recoil] |
| Gun Sight | Flakviser 37 |
| Gun Mount | Cruciform Platform |
| Carriage | Two Wheeled Trailer |
| Trailers | [@trailers] |
| Gun Shield | 5mm |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.300mm (L/65) |
| Overall Length | 3.63m |
| Width | 1.81m |
| Height | 1.60m |
| Weight | Weight in Traction: 374 kg Weight in Action: 312 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 | Mule or Pack (seven loads) |
| Variants | [@variants] |
| Notes | The Geb Flak 38 was a lighter version of the standard Flak 38. It was issued to mountain units of Gebirgsjäger divisions. It was also used in the ground role as a light anti-tank weapon. It could be towed by a single horse of mule and could also be broken down into smaller loads and carried by troops or pack animal. |