Trolley

Locations: https://imgur.com/a/R6FLE7j

1: In the factory room across from Stamin up.

2: In the power switch area next to the m16 wallbuy.

Car Door

1: In the building where the box spawns in, located at the opposite corner.

2: Outside of the myster box building sitting on a bench



1: First off, you need to earn 25 kills with the shield, my tip is just to create groups of them to conserve time and durability. Do this until you hear a ee chime play.

2: After that, you want to hit the 3 Shaun Of The Dead posters around the map with the shield.

Locations: https://imgur.com/a/mbo99An

1: After going down the building that has a hole all the way through it and onto ground level, go around the truck and you'll see it next to the Vektor wallbuy.

2: After taking the jump pad in the green lit building and going down the slippery ramp after landing, across from Widows Wine another poster can be found.

3: And finally, the final poster can be located after going in the sewer pipeline in pap and before taking the next jump pad after, it'll be on your right.

Upgraded shield abilities

• Increases durability by a large margin
  
• Permanent upgrade, so you can pick it back up on the buildable bench
  
• You can replenish your shield at any time, even if it hasn't broken

And congratulations! You've successfully upgraded the shield! Hope this guide proves usefulness!