The current 2K22M1 carries the 9M311-M1, which tops out at an advertised 6km ceiling, which is roughly 20k feet. The previous 9M311-no-suffix has the 3.5km ceiling.
https://www.deagel.com/Defensive%20Weapons/9M311/a000996
“The current 2K22M1 carries the 9M311-M1, which tops out at an advertised 6km ceiling, which is roughly 20k feet. The previous 9M311-no-suffix has the 3.5km ceiling.”
Literature says -M1 is downgraded export version. I will do a fly-over tomorrow and let you know which is correct.