The first radio of Mission 3 is around the corner from the first group of hostages. After you rescue them just keep heading back and the right.

This is right after the first group of hostages. You will immediately come to a second group. Step jump to the broken ladder and then drop down and take out the 2 guards. Saving both hostages will net you the gun.

After eliminating all the bad guys and gaining entrance to the Zoo loading dock the radio is inside next to the large metal overhead door you need to go through to advance.

This is just to the left of the the turret on top of the second control room for the tram.

After moving the tram the first time you will fight your way to the second tram control room. The spare part in inside this control room.

This scope is in the strongbox at the downed chopper. Work your way down the right side to take the officer and get everyone down fast so that they don’t shut the box.

Choose to shot the tiger at the moral choice to get these parts.

When you have to rescue the zoo worker in the cage. Before you actually free him had to the back right. Climb the ladder and the part is on top of the cage.

Before exiting the mission the cat is on top of the overhead structure at the exit.