The accuracyweight_mod.rar file you have requested: Clear Sky / Mods / Singleplayer / Accuracy and Weight - 10.18kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
This increases your guns accuracy so that its easier to hit whatever your aiming at. It also increases the amount of items that you can carry, you can carry up to 150kg before slowing down and 200kg before stopping completely.