Objective 3: Disable Guardrail

Begin by heading west to find a water tower. Eliminate the sniper positioned on it.

Move forward to a small, tree-covered hill. Observe west for approaching enemies, including an armored vehicle. Prioritize taking out the gunner to make the vehicle retreat, then eliminate the remaining enemies.

Advance to the next hill and eliminate approximately three enemies located to the south-southwest. Remember that the sniper rifle can penetrate cover like wooden bundles.

Proceed east to a wall and look around to find four enemies inside a warehouse. If low on ammo, pick up enemy weapons.

Move through the warehouse to reach a turntable area. Head up the interior catwalk.

When an opening appears to your right, crouch or go prone and eliminate the enemies on the floor below. A sniper rifle is effective here; otherwise, use single shots with your scope.

Continue down the catwalk, cross the open area to the east, and follow the path to an ammo box. Consider switching to an enemy 36k Carbine, as the sniper rifle may be less useful now.

Go up another catwalk and descend to a railroad area guarded by approximately four enemies. Note that jamming will prevent these enemies from appearing on your HUD.

Move south and then cross over to locate Guardrail IX, which is defended by six enemies.

Find cover behind a brown metal crate. Eliminate the two enemies on top of Guardrail IX first, then the two in the window, and finally the two at its base.

Once all defenders are cleared, move around the tower to find stairs leading down. Follow the path, ascend the tower, and plant the C4.

After planting the C4, quickly retreat down and around to a ditch, then go prone. Hold your position until extraction is authorized.