Where is the vss in Metal Gear Solid 4 guns of the patriots

The VSS sniper rifle can be found in Act 2 of Metal Gear Solid 4: Guns of the Patriots. After the Power Station, head north to the Confinement Facility. After going up the hill, you will see a long stretch of road lined by rice paddies. Head all the way northwest where you will see a house with two trucks parked in front of it and a watch tower. The VSS is in the northwest room of the house, along with some 9x39mm ammunition and a stun grenade.