The sawed_off1.zip file you have requested: Skins / Weapons / CS: Source DarkElfa's Sawed-Off M3 - 3.61mb 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:
This time DarkElfa brings us a very nice model for the M3 Shotgun of Counter Strike: Source. The model is well done, and seems accurate enough, right down to the scope/aimpoint and strap attached to it, which is a nice bonus. The skin is also detailed and has a battered, "war torn" appearence to it, giving it a more realistic look. For those that don't like the scope/aimpoint, there's also an unscoped version of the shotgun in the file, so you don't have to worry about liking part of the model, but not all of it. The only thing that may put people off is that the strap on the gun says "DarkElfa" on it, but it's not too noticeable, so it's not much of an issue.