The m4dp1x3l_m3_silver.zip file you have requested: Skins / Weapons / CS: Source M3 Shotgun Silver Skin - 361.42kb is not available. Perhaps try browsing all files for the game Counter-Strike: Source and upload any files you want to share or are missing. This is the only information we could locate:
Yet another great CS: Source skin by m4dp1x3l. This time it's a silver M3 Shotgun one. Give it a go.