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This mod makes a small improvement in the performance characteristics of weapons such as: Weight, wear, accuracy.

This mod slightly reduces weapon wear, weapons became a little lighter and began to shoot a little more accurately.
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If the mod still did not work, since the game does not allow you to run LTX files via the .PACK format!

You need to go to where the downloaded mod is located "C:\steam\steamapps\workshop\content\2427430\3487115756"
There will be a file "fixaccuracyCOP.pack" - It can be copied to an empty folder on the desktop and the file extension changed to ".db10"
After that, try moving it to the game resource folder "\steamapps\common\STALKER Call of Prypiat - EE\resources" (I haven't personally checked it)
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If the mod still doesn't work =(
You will need an unpacker for S.T.A.L.K.E.R. files.
I personally used Universal Extractor 2.0 - you can easily download it.
Run it and you will need to select the folder in which the file "fixaccuracyCOP.db10" you have already modified will be located
After unpacking, a folder should appear "gamedata"
Copy this folder to the root folder of the game and it SHOULD 100% work.
(I personally used this method a couple of times)