Fixed the firing light positioning when ADS

Fixed the model of the sight, didn't look good before

Added the sight (Toggle with X)
Changed the silencer to use ZZ
Can now ADS with right click

Fixed a positioning issue that i may have caused by misplacing a 2

Fixed another issue with the silencer's placement
Fixed the texture on the silencer being metal and not diffuse thanks to development artefacts

Fixed an issue with the silencer not being removed properly