Yes they exists. Those hacks are called "RapidFire MP7K" for fast shooting anything: like nades, full auto pistols or even sniper ; and to get onto roofs theres an option called "SuperJump" that make u jump very high so u can land on any rooftops. The sad part is that those options are only included in VIP or Private hacks, so u need to pay in order to use them. I hope this helped !