NGP^85 -- Self Propelled SAM ?

[shortreengage]

Whether is in NGP^85 Self Propelled SAM ?
Only artillery air defence (max. range fire = 2 hex.) has not enough for struggle against helicopters.
Helicopters freely get into rear of the opponent, never often fired.

For example, SA-13 Gopher (range fire = 3 hex, in a reality 5000m) and M48 Chaparral (4800m).