The m4_addon_retex.rar file you have requested: Call of Pripyat / Skins / M4 (LR 300 retex) + Black Addon retex - 194.19kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Call of Pripyat and upload any files you want to share or are missing. This is the only information we could locate:
This is a reskin of the LR 300 ingame to make it look like a M4.It also includes a reskin of the addons ingame so they look black.