Build a Boss Parts
All boss parts in Build a Boss: best guns, lasers and armor, part rankings and which parts to buy first for the strongest boss.
What are Parts?
Parts are the building blocks of your boss in Build a Boss: guns, laser cannons and armor plates. The parts you equip decide your boss's damage, range and survivability.
Why compare parts?
Buy the Best First
See which parts give the biggest power spike for their cash cost
Build a Cohesive Boss
Combine guns, lasers and armor that work together instead of fighting each other
Stay Ahead of Waves
Keep your part loadout current so each new zone stays beatable
Featured & Essential
Build a Boss Strongest Parts: Best Weapons & Upgrades Guide
Discover the strongest parts in Build a Boss, from turrets and beams to crit upgrades, plus skill tree, rebirth, and star-farming strategies.
Build a Boss Parts Guide: Best Parts, Costs & Loadout Tips
Learn which parts to buy first in Build a Boss, how cash and gems work, and the best skill combos for fast wave clears.
All Parts
Build a Boss Best Parts: Tier Rankings & Top Combos
Discover the best parts in Build a Boss, ranked by tier. Compare heads, arms, torsos, and legs to build the strongest boss for every battle mode.
Build a Boss Boss Parts: Setup Guide & Upgrade Tips
Learn how Build a Boss boss parts work, which components to upgrade first, and how to assemble high-performance boss builds step by step.