| Basic parameters | OP-4M |
| Magnification | 5,25x ÷ 6x |
| Field of view | min 10,5° ÷ 11° |
| Diameter of output pupil | 5,25 ÷ 5,5 mm |
| Distance of output pupil | 22,0 ÷ 24,5 mm |
| Ocular setup | -0,5 D ÷ 1,5 D |
| Length of the sighting device in operation position | 433 mm |
| Weight of sighting device | 5,1 kg |
| Weight of the set | 11 kg |
| The temperature range for operation | -35 °C up to +45°C |
| Vibration – amplitude 0,15 mm, frequency: 10 up to 55 Hz | 10 min |
| Impact in longitudinal and transverse axis – three impacts per axis | 500 m s-2, 6 ms |
| Hermetic (pressure drop at 30 kPa overpressure) | max. 0,4 kPa/30min |