Sniper allocater

If possible
And I don't know if it would allocate snipers with a silencer, maybe even this is possible

Build in to the head gear  for example

 So the base can give the coordinates


The device should be very small and very low in weight

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The device should recognise the sniper fire/shot and give the location or at least the direction

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Update:
 Or a small loose device which shows direction and maybe distance

2017