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Home of the CRBL

Home of the CRBL

The Combat Robotics Brick League (CRBL) is a robot-fighting event featuring designs made from LEGO elements. Build, compete, and iterate — with a focus on creativity and good engineering.

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Featured CRBL Designs

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Pyronite

Built by AdventCD

After it's debut performance in 2025, getting the judges choice award at CRBL S6, and second at Texas Brick Brawl S8, Pyronite has shown that it can hang with the best bots in the world, as it currently holds the title of the best 2lb drumspinner. Some of Pyronites most notable wins come from bots like Greeble, Papi, Catastrophe, Tempest, and Warhard. The bot is made up of two Buwizz 3.0s for the batteries, while possessing two Gen 3 Mould King L motors for the drive, and the weapon being powered by two Buwizz Motor clones. While 2025 was an amazing start for Pyronite, 2026 will hopefully bring even more success to the drumspinners name, and firmly establish itself as one of the best robots of all time. Special thanks to Nick Cowen for making this robot possible, as without his second B3 that he generously gifted me, Pyronite as it now stands would never exist

Greeble

Built by Joe Hafner

A horizontal midcutter with high maneuverability, weapon speed, and low spin-up time, intended to evade opponents and deliver powerful strategic blows. The weapon disk is centrally mounted, but serves as either an undercutter, or overcutter depending on orientation.

Biscuit Head

Built by Nick Cowen

Biscuit Head is the first ever reliable Lego flywheel flipper, and has gone far from an initial attempt to prove a concept. Biscuit Head has fought in 4 events with an overall winning record of 16-10. It has earned the CRBL S3 greatest design award, and achieved podium finishes in each of its two CRBL events.

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Digital build instructions and CRBL resources.