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GAU-4 20mm Vulcan M61A1/M61A2 20mm Automatic Gun |
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| Designation: | M61A1, M61A2 |
| Type: | Six-barrel, hydraulically operated 20mm Gatling gun |
| Contractor: | General Dynamics Armament Systems |
| Rate of Fire: | 6,000 rounds per minute |
| Effective Range: | Several thousand yards |
| Ordnance: | 20mm shell |
| Weight: | 255 lbs (114.74 kg) |
| Mount: | Internal |
| Muzzle Velocity: | 3,400 feet/second (1037 m/s) |
