We all know that the basic weapons ingame look like sh*t, so with this mod it replaces the top 3 tier of the weapons with more details / real colors, e.g. the MP5 SMG is now black-darkgrey with a real hand guard, not blue with a stripey thing. Also the M4 is now black - really dark grey, with more detail.

Worth getting this mod if you have a slow computer, and weapons mods could slow it down, these are jsut skin changes, so same filesize, no game performance difference, they just look better