With the 2020 updates of Arma 3 this achievement is possible with common methods once more.
In Virtual Arsenal Load your soldier's backpack and armor with Explosive Satchels and Explosive charges
Load the Virtual Vehicles surroundings with explosives, around and below them if possible. Placing a Satchel behind of each vehicle for extra damage.
Once you've loaded each vehicle with sufficient explosives get to a safe distance and Touch all bombs. If they all turn orange or red at the same time. They will recognized as disabled and the achievement will unlock.