The thing your talking about is called "chams".
The only hack that is available is:
https://www.mpgh.net/forum/164-combat...lphi-hack.html
The 'NX CHAM' lets you see the enemies in blue/green.
-There is no one shot kill.
Also make sure to check out MPGH finest VIP on the market for Combat Arms.
https://www.mpgh.net/forum/164-combat...red-chams.html
-Enjoy
--ortax