Combat robotics · 150 g ant-weight class

Build. Drive. Battle.

Ant-weight combat robot kits, parts and tutorials for makers who want to build a real fighting robot.

New to the sport?

What is combat robotics?

Combat robotics is a sport where two remote-controlled robots go head to head inside a fully enclosed arena. Each robot is designed and built by its team to disable, out-push or out-manoeuvre its opponent in a short, timed match. It is engineering under pressure: every design choice gets tested the moment the match starts.

Robots compete in weight classes, from 150 g ant-weights that fit in your hand to heavyweights over 100 kg. Most builders start in the small classes, because the parts are affordable, the arenas are small and repairs are quick.

Two robots, one arena

Matches are one-on-one inside a fully enclosed arena, so builders and spectators stay safe while the robots fight.

How you win

Win by knockout, when your opponent can no longer move under control, or on a judges' decision if both robots are still running when time is up.

Weapons and strategy

Spinners store energy for huge hits, flippers throw opponents around, and pushers win on traction and driving skill. Every design trades power against weight, reliability and control.

Built by you

Robots are designed in CAD, 3D printed, wired and driven by their builders. Designing, building and repairing your robot is half the fun.

Start here

From box to battle

Every Aspire starter kit comes with a user guide and the CAD files for your robot, so you can build it, understand how it works and make it your own. Here is how most builders get from unboxing to their first fight.

Choose your kit
Pick a flipper, pusher, vertical spinner or horizontal spinner. Pushers and flippers are non-destructive and a great first robot. Spinners hit harder but need more care to build and drive. Every kit is available with or without the controller.
You get: A complete 150 g robot design
Build it
Follow the user guide and video tutorials to assemble the chassis, wire the electronics and fit the weapon. You don't need any experience, just basic tools and some patience.
You get: Real hands-on build skills
Drive and test
Practise driving before your first fight, because control wins more matches than power. Check your failsafe works, test your weapon safely in an arena, and use the CAD files to tune the design.
You get: A robot that is truly yours
Compete and upgrade
Battle your friends or enter an ant-weight event near you. Between fights, repair and upgrade your robot with spare parts from our range.
You get: Parts when you need them

Starter kits

Choose your fighter

Four 150 g battle bots, each with a user guide and CAD files. Spin them around and compare them below.

Non-destructive

Flipper

Get under your opponent and launch them with a high-torque servo flipper, all on a tough 3D-printed PLA frame.

Power
Control
Difficulty

Weapon: High-torque servo-powered flipper
Chassis: Tough PLA
Electronics: Aspire Antweight Controller, pre-soldered
Weight: 150 g ant-weight class

From$101.20 Choose this robot

Available with or without the controller.

Rules and safety

Build it safe, build it legal

Many events, including ant-weight competitions, run on the SPARC rules (Standardized Procedures for the Advancement of Robot Combat). SPARC publishes the robot construction specifications, match rules, judging guidelines and arena best practices that event organisers use.

Always check the rules for the event you are entering, as some events add their own.

Read the SPARC rules
Start with the Robot Construction Specifications at sparc.tools. They cover weight limits, weapon and battery rules, and the safety features your robot needs to pass inspection.
Working failsafe
Your robot's drive and weapon must stop if it loses signal from the transmitter. Test it before every event.
Easy power-off
Fit a power switch or removable link that is easy to reach, so your robot can be made safe quickly after a match.
Weapon locks
Spinners and other active weapons need a lock or restraint outside the arena, so they can't start while being carried or worked on.
LiPo battery care
Charge LiPo batteries with a balance charger, inside a LiPo-safe bag, and never leave them charging unattended.
Weapons only in an arena
Only spin up weapons inside a fully enclosed arena. Never test a spinner on a bench, table or floor.

Compete

Find a competition near you

Robot Combat Events lists robot combat competitions around the world, with dates, locations, weight classes and registration details. Filter by the 150 g Fairyweight class to find events for ant-weight robots, or use the map to find one close to you.

Before you enter, check the event's rules and make sure your robot meets the SPARC construction and safety requirements.