can't destroy enemy AI vehicles..?

[SNJ]

I was trying to make a CIWS and first of all even though I can get the thing to aim using the Phalanx radar, the AP bullets either don't do much or it's missing all shots; anyway I'm not shooting down any planes or helis.

But: all of a sudden a plane and heli come crashing down right on top of me and it turns out they collided lol, the tip of the wing from the plane was stuck in the cockpit of the heli and they were spinning about wildly. So I unleashed my CIWS on them after they crashlanded but they don't blow up or anything, just get heavily damaged I guess.

I also tried blowing them up with three C4 blocks.. nothing.

Cleanup vehicles also didn't remove them.

?

[RiftHunter4]

I shot down enemies for an hour today and some of them disappeared after a while. I don't know what cases them to eventually go away.

[Gheorghe Garaj Auto ITP]

Vehicles naturally despawn after a while (AI vehicles that is), as for removing vehicles with brute force, enough warhead explosives will cause a vehicle to disappear. Don't ask how I found out.