The fastest-killing sniper rifle in Wardogs is the AMR 50 — ranked here by measured time-to-kill across every sniper rifle in the game, with the reasoning and the full board below. Fastest TTK, not an unqualified “best gun.”
The fastest time-to-kill among sniper rifles in Wardogs belongs to the AMR 50 -- about 1090.9ms on a balanced profile. But the AMR 50 is a heavy .50-cal anti-materiel rifle: the fastest on the trigger, but slow to handle and situational -- not the conventional sniper most players run.
For the conventional sniper rifle you would actually run in most fights, the SV98 is the fastest-TTK standard sniper rifle at 1384.8ms -- that is the pick this guide would hand most players.
The full board below scores 5 sniper rifles on measured time-to-kill from community ballistics testing, ranked honestly by raw kill speed -- the AMR 50 really is first on the trigger; the context is what it costs you to carry.