[quote=Cartwright]
8 kilometers isn't very far away o.o I mean even the world's longest sniper confirmed kill isn't that far away
[/quote]

No, but given we're operating inside a training area, it makes sense that we'd be operating within a confined 'box' of safe terrain, even if we're not live-firing ammunition. So, while the ranges we fight at might be longer if it's real, for a training mission 8km is probably about right. 

IIRC, the longest confirmed sniper kill is by a Canadian Sniper in Afghanistan who made a kill shot at slightly over a mile away. It's on the internet in numerous places.