The stalkercopil86sgi.zip file you have requested: Call of Pripyat / Mods / IL86 & SGI 5k Addon Fix - 7.92kb 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 mod is doing nothing else than making it possible again, to attach silencer, scope or grenade launcher to the weapons IL 86 (Enfield L85A2) and SGI 5k (SIG SG-550). This was probably disabled in CoP due to the game balance.