In 1965, some SBLim-1 and SBLim-2 aircraft were modified for artillery observation and fire correction purposes and designated SBLim-1A and SBLim-2A. The rear cockpit was adapted for an observer by removing some equipment.
The armament was increased to two 23 mm cannons. The SBLim-1As were withdrawn in 1975, while the SBLim-2As were converted back to training aircraft during overhaul and redesignated SBLim-2M. The last examples were withdrawn from service in the early 1990s.
| Wingspan | 10.08 m |
| Length | 10.10 m |
| Takeoff weight | 5 446 kg |
| Maximum speed | 932 km/h |
| Ceiling | 13 950 m |
| Range | 1 054 km |
| Armament | 2 x 23 mm cannons |
| Engine | Rotary engine of unknown type |
