https://www.facebook.com/groups/GDLMexCounterStrike/

Check the winner to make sure they don't already have this. I own this and it still lets me enter the giveaway.

Note to Tomb Raider owners: If you're checking to see if you have this or not, be aware that it will be listed in your library on the Details page for Tomb Raider as "Tomb Raider: Hitman Gun - Silverballer" instead of the title above.