Uzi: mag drop and shell ejection - Mag drop on world model reloads - Shell ejection in first person and 3p: new eject_shell (viewmodel) and w_eject_pistol_shell (world, on the uzi shell_eject bone) - viewmodel updated, shell eject position + enforceClipWeights on so fire/fire_ADS sharing a blend tree don't spawn two shells per shot