ANSWER
Chair yes we could have used the AK-47 but doput yourself in our position, we are attempting to eliminate aman.   Had we shot him with the .22 then no-one would have knownfrom where we had shot because of the buffer on the firearm, wewould simply have been able to drive out calmly, like normal people,and no one would have imagined that the shot would have come fromour vehicle.   If, however, we had used the AK-47 then the policeat the airport would immediately have acted and most likely alsosome of the surrounding individuals, simply if only by runningtowards the scene and that would have made our escape possibilityso much more limited.