How do you complete the cowboy achievement ie where is the revolver in bad company 2

Firstly, you don't need to get a revolver off of a cowboy. To get the revolver go to the level Unwelcome Guest. Go to the room where the gate closes, go right, through the room with th soilders in, and then left at the T junction. Go through the doorway straight ahead, withe the green light. Go round to the right so that effetively you have done a u-turn. Kill the soilders then go left down the stairs. You will arrive in a toilet and shower area. Go to the right, to the cubicles. One cubicle has toilet roll coming out of it. On top of the toilet is a revolver. Success. Follow the checkpoint arrow and you will come to a control room full of soilders. You can complete the achievement in here, but you don't have to.