in A1: Revenge, one of the BIS single players then they use H (invisible)s to make targets for the grenadiers. i dont know if it would wrk for aks, but you could giv it a try.
just make a h and say:
loon_1 doFire helo_pad, or if ur bold:
loon_1 doTarget helo_pad; loon_1 doFire ["M16Muzzel","Burst","M16"]
ive had trouble w/ the second one though
good luck m8