While Fiona is describing what she saw in the hangar, Michael turns his back to the camera in the wide shot. The camera goes to a close shot, but Michael is now FACING the camera without having turned back around.
The Desert Eagle that Eli uses is known as the Baby Desert Eagle. This is a smaller version of the full-sized magnum cartridge chambered models. It is available in 9mm, so Fiona's comment is correct.