[piytar]

Openly available info say the block II Stingers can get to 8 km = about 27,000 feet. And that is likely an underestimation.

[Spktyr]

That’s the Stinger’s horizontal range. It doesn’t have that for vertical range.

[cynwoody]

Openly available info say the block II Stingers can get to 8 km = about 27,000 feet. And that is likely an underestimation.

According to this page, the maximum altitude is about 12,500 feet:

Max range: 8,000 m
Max effective range:  (FIM-92A) greater than 4,000 m
                                       (FIM-92B/C) 4,800 m
Min effective range: 200 m
Max altitude: (FIM-92A) 3,500 m
                        (FIM-92B/C) 3,800 m
Min altitude: effectively ground level

It gives a maximum range of 8,000 m, or 26,247 feet, but a maximum effective range of only 4,800 m, or 15,748 feet. IOW, don't count on hitting anything flying higher that 12,000 feet or further away than 3 miles.