Hey if you want to have this skin and dont know what to do with it? here are some tips to do with this skin (mods,and other things)
1.get a sdk gun mod and get the sniper rifle.
2.get revolver mod or use a pistol from sdk gun mod.
3.Get the improved 1st person mod.
4.get the ring mod (use the invisible power ring)
5.get smart moving mod (for going prone) but you dont have to use this mod but it will be better.
6.get on a sever or your own world.
7.get to a hiding spot or sniper tower
8.use the invisible power ring (so no one cant see you)
9.Happy sniping!
Links:http://www.planetminecraft.com/skin/killzone-3-sev/
http://www.planetminecraft.com/blog/killzone-3-texture-pack/