| Vektor GA-1 | |
| Origin: | South Africa |
| Used By: | South African National Defence Force Indonesian Navy |
| Type: | Autocannon |
| Is Ranged: | yes |
| Rate: | 750 rds/min |
| Caliber: | 20×82 mm |
| Manufacturer: | Denel |
The Denel Vektor GA-1 is an automatic cannon based on the German WWII MG 151/20 automatic cannon. Compared to other rapid-fire 20 mm autocannons, it is lightweight and has low recoil due to its design and the use of the 20×82mm cartridge. The weapon was intended for use in vehicles, naval vessels, and helicopters.[1] One gun was fitted to the Atlas XH-1 Alpha attack helicopter demonstrator.