Oerlikon GAI-BO1
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PlaceoforiginSwitzerland
UsedbyArgentina
Austria
Nigeria
South Africa
Spain
Switzerland
Afghanistan
Austria
Nigeria
South Africa
Spain
Switzerland
Afghanistan
WarsCold War
| Oerlikon GAI-BO1 | |
|---|---|
 Oerlikon GAI-BO1 mounted on a M113 | |
| Type | Anti-aircraft gun Autocannon |
| Place of origin | Switzerland |
| Service history | |
| Used by | Argentina Austria Nigeria South Africa Spain Switzerland Afghanistan |
| Wars | Cold War |
| Production history | |
| Designer | Oerlikon |
| Designed | 1950s |
| Manufacturer | Oerlikon[1] |
| Specifications | |
| Mass | 405 kg (893 lb) |
| Length | 3.8 m (12 ft 6 in) |
| Barrel length | 2.4 m (7 ft 10 in) |
| Width | 1.5 m (4 ft 11 in) |
| Height | 2.5 m (8 ft 2 in) |
| Crew | 2[1] |
| Shell | Fixed QF 20×128 mm[2] |
| Shell weight | .125 kg (4.4 oz) |
| Caliber | 20 mm (0.79 in) |
| Action | Gas |
| Carriage | Two wheeled carriage with three folding outriggers |
| Elevation | -5° to +85° |
| Traverse | 360°[1] |
| Rate of fire | 1,000 rpm (cyclic) |
| Muzzle velocity | 1,100 m/s (3,600 ft/s) |
| Effective firing range | AA: 2 km (6,600 ft) Ground: 1.5 km (0.93 mi) |
| Maximum firing range | AA: 4.5 km (15,000 ft) Ground: 5.7 km (3.5 mi) |
| Feed system | 8-round magazine 20-round magazine 50-round magazine |
| Sights | 1× aerial targets 3.5× ground targets[1] |
The Oerlikon GAI-BO1 is a Swiss designed and built light anti-aircraft gun which is mounted on a two-wheeled carriage with three folding outriggers. Due to its light weight and ability to be broken down into small loads it can also be mounted on ships and vehicles.