Alright, so the first mission in CoD Modern Warfare 3, Black Tuesday, has been severely glitched for me. In the middle of the mission, when you have to use the XM-25 to take out the enemy APC, I can't switch to it, as if it wasn't even given to me in the first place. And if I try to switch between the sights on the Hybrid Sight, it shows me with an RPG-7 with no ammo and a Javelin with no ammo. Eventually from switching between them, I get to "default weapon", which just shows two mutilated hands, and then the game freezes. Any fix for this?
Mind you, I've never experienced this glitch when I played it on my step-brother's console with him a while back. This is a glitch that's happened rather recently. And to be specific, it's a 360 Slim.