| Manufacturer | Lockheed Martin |
|---|---|
| Country of origin | United States |
| Used on | Atlas II |
| General characteristics | |
| Height | 3.43 metres (11.3 ft) |
| Diameter | 3.05 metres (10.0 ft) |
| Gross mass | 4,187 kilograms (9,231 lb) |
| Derived from | MA-5 |
| MA-5A | |
| Powered by | 2 RS-56-OBA |
| Maximum thrust | 2,100 kN (470,000 lbf) |
| Specific impulse | 296 seconds (2.90 km/s) |
| Propellant | LOX/RP-1 |
| Launch history | |
| Status | Retired |
MA-5A was an American liquid fueled rocket stage. It was manufactured by Lockheed Martin for use on the Atlas II rocket, derived from the MA-5 used on the Atlas I.