The blackmagsp.zip file you have requested: Skins / Weapons / Half Life 2 Black Magnum SP Skin - 311.15kb is not available. Perhaps try browsing all files for the game Half-Life 2 and upload any files you want to share or are missing. This is the only information we could locate:
Skin for the Magnum. A black Magnum with wooden grips. Now for Half-Life 2 Single Player.