It's so dam easy, this is how it works :

Open :
1. Open CombatArms
2. Open Hack
3. Start Game & Close the Internet

now u see the hackshield loading
________________

when its 30% loaded u need to check if the hack says :
Bypass Inject [0]
Injected.

if it says after the hackshield is loaded then u game crash.
so make ur PC a bit laggy so the hackshield laggs, when ur in game press alt tab and close the bullshit.
enjoy chams