The longest confirmed sniper kill was used with this rifle, the AWM. It is quite a nice rifle in my opinion. I modeled and rendered this in Blender/Cycles.
Specs for curious fellows:
Blender 2.75 Cycles
100 Samples @ 3840x1080 4mins 32secs (NVIDIA GeForce GTX 650 Ti BOOST 2GB)
55mm Camera @ f/stop 128.00
Blue/Red/White 3 Point Lighting Scheme w/ HDRi Studio Lighting
Infinite Background (Dark Grey)
Post Processing in After Effects:
-Kodak 5218 Kodak 2383 LUT
-Levels Adjustment
-HSL Adjustment
-2 Power Windows (Added Blue)
-Overall HSL Adjustment
-Curves Adjustment
-Eastman Color High Speed Neg 400T (5294)
Note: This is a VERY stylized Post Processed Image
P.S
If requested, I can show a video breakdown of the whole render 
Enjoy!
This is very Mad Max: Fury Road inspired (Loved that one 
)