There's no reason to use anything besides a shotgun in MW2. Solves all my problems. But anyway, if you use the perk 3 Flak Jacket, you can tank one, if not both, tubes. Normally you die from splash damage from tubes, not direct impact. An emp grenade disables the cars a lot quicker than they used to. Combine Flak Jacket with an additional 3, 5, or 7 deathstreak Body Armor advantage, and tubes are nothing to worry about. What I don't like about the RC-XD is the spawn protection granted after the killstreak is over. Same with the Predator, Smartbombs, AGM, and AC130. Granted, I don't usually stop running ever, but getting knifed in the back when you can't even see the enemy coming is annoying. When I do use the RC-XD, it is purely to defrost. If the timer runs out, yeah I might blow someone up if they are next to me. What is good about them, or Predators, Smartbombs, AGMs, and AC130s is that if you hit a car and blow it up, and an enemy, that counts towards your killstreak. I normally use the 4-killstreak SAM Turret, so if I can get that 4th kill while in an RC-XD, it makes me happy.