http://crysis3s.com/stats_pc/roqac3dlc23

i know a hacker but he is nr1 in the claw and sas leaderboards XD

Possibly not a hacker. Maybe he has been testing those weapons on a modded server (same with gamemodes)? Looks like it's possible.

Edit: Nvm... Only checked weapon stuff xD. Six dogtags per kill at best, mmmsuuuuuuure.