If there were only a particluar number of .50 cal rifles purchased, wouldn't it be a rational reason to expect that wherever the rifles orginated within Iran, (I would surmise that its either VEVAK or Qods) they are supporting the operation with training for the snipers, if so how would the trainees be chosen, how long and where is the training taking place. at what rate are they producing snipers? From a logistics point of view it would be easier to have the rifles already in country than to have the sniper smuggle it themselves.