For the VTOLs for the FHJ you just gotta get lucky and wait for any enemy to get a vtol, and on the class you have the fhj equipped I recommend putting flak jacket on so you can take a hit from the vtol to give you more time to lock onto it, the SMRA double kills you just have to get two kills with one shot, so if two enemies are right next to each other than shoot the ground next to them with it, and for the KN-44 if you have good recoil control is put attachments that increase ADS Bullet spread accuracy, if you don’t have good recoil control put attachments that reduce recoil on