Was having a lot of fun playing with modded turrets, but their explosive bullets kept destroying my walls. Thus, I decided to make a mod of a "end-game" wall that is impervious to explosions, at a high cost however.

Properties:
Health: 1200 HP
Resistances:
Physical: 40% reduction, 5 flat reduction
Explosion: 100% reduction
Fire: 100% reduction
Acid: 90% reduction
Laser: 90% reduction
Electric: 90% reduction

Crafting Recipe:
Ingredients:
Refined Concrete: 5
Uranium-238: 2
Crafting Time: 4 seconds

Technology
Prerequisites: Uranium Processing, Military Science Pack, Stone Wall