Halo 3 achivement

I have one last non-XBL achivement left in Halo 3 and I can't get it. It's the used car salesman one where you have to destroy a vehicle w/ 3 enimies in it. I've tryed shooting down a phantom on Tsavo Highway and blowing up the prowlers w/ a rpcket on The Ark. The Tsavo Highway one just did not work and every time I hit the prowler w/ a rocket it kills all the guys in it and does not destroy the vehicle it just damages it.

If you can tell me a good way to get this achivement it would b much apreciated.

I have all of the achievements in halo and i got it on the covenent level near the end were the scarab tanks arrive just save the spartan laser till then or......... in the beginning after you defeat the anti air wrath and pass the banshees continue on with the level like normal and then when you get to the wraths and there are vehicles driving around there try that.

Xbox live gamertag: corbinator04

i got it off a glitch by accident on the crows nest level i shot the gun of the phantom with the machine gun then i got the achievment somehowangrules23

Same here. Have you tried that?

Do it on easy so the vehicles get destroyed in one shot.Frenzyd109

Has to be on normal for achievements

I did it in the second level. Shooting the giant ships that fly into the base thing. I used a turret.MuffinPunk

Thats one of the few and first achievements I got on Halo 3. I need to beat the game on legendary...maybe I will have the incentive to put the disc in its drive one day.