The crosshair.g36.wildwing.zip file you have requested: Shadow of Chernobyl / Skins / Weapons / Alternate Crosshair Model for G36 - 220.04kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R. Shadow of Chernobyl and upload any files you want to share or are missing. This is the only information we could locate:
Here is an alternate crosshair you can use for the G36, created by Wildwing.Simply unpack it into your Stalker folder, and you're ready to go!