Viper V3 Kit – Weaponized Horizontal Spinner Full Bundle
Viper V3 Combat Robot Kit
The best-selling 1lb robot—now even better.
FingerTech’s Viper V3 is the ultimate starter bot for combat robotics. Easy to build, fun to fight, and upgradeable as you grow.
- Battle-ready kit: Includes chassis, motors, wheels, ESCs, armor, a Horizontal spinner, and more
- Improved design: Upgraded UHMW armor, new baseplate, motor shaft supports
- Complete: This kit has a weapon, radio, charger, and battery to build a destructive killer bot
$372.99
Product Documents
Drawings - PDF
Drawings - CAD
Instructions
Viper V3 Combat Robot Kit – With Horizontal Spinner Weapon System
The legendary Viper — now armed and battle‑ready.
FingerTech’s Viper V3 Combat Robot Kit has introduced thousands to the world of combat robotics. Now enhanced for durability, performance, and expandability, this version includes a savage horizontal spinner weapon—ready to dominate the Antweight ring.
This all-in-one bundle includes:
- Viper V3 base kit: Motors, wheels, ESCs, chassis, armor, switch, wiring—and comprehensive build instructions.
- Power system: 300 mAh 3S FingerTech Galaxy LiPo battery and C6D charger for high-energy combat. The LiPo has been upgraded to support high-impact weapon systems.
- FlySky T6A transmitter and receiver: Pre-configured for combat robotics, also comes with a programming cable and Mac/PC software so you can customize if desired.
- Horizontal spinner weapon kit: Motor, horizontal titanium blade, blade mount, and all required hardware.
- Weapon-ready armor: Includes standard UHMW front armor and polycarbonate top armor designed specifically for horizontal spinner compatibility—no need to modify standard parts.
What’s new in the V3 Viper?
A redesigned baseplate with extra mounts, upgraded UHMW front armor, tinyESC v3 with safer calibration and improved efficiency, lightweight Twist Hubs for quick wheel swaps, and flanged bearings for motor shaft durability. All battle-tested and ready.
Why choose a Horizontal spinner?
This weapon delivers devastating side strikes—capable of cutting up your opponents and controlling the match.
Recommended for ages 10+ (6+ with adult supervision). Antweight legal: The Viper Horizontal Spinner full bundle kit weight with a titanium blade comes in at 15.1oz (428g), even with a 3S 300mAh battery.
Resources for robot safety and safe testing:
- FingerTech Combat Robot Safety Guide
- FingerTech Test Box Build Instructions (PDF)
- Watch Seth Schaffer’s Test Box Guide (Video) below:
Key Features
- All-in-one combat bundle: Includes chassis, drivetrain, battery, radio, and weapon—everything you need to battle out of the box.
- Hard-hitting Horizontal spinner: Delivers powerful sideways strikes that whack, cut, flip, disable, and destroy opponents.
- FlySky T6A transmitter included: Pre-programmed for combat robotics with fine-tuned throttle and failsafe settings.
- Upgradeable V3 chassis: New baseplate with more mount options, reinforced UHMW armor, and motor shaft supports.
- Custom weapon armor: UHMW front wedge redesigned for spinner integration and durability in direct impacts.
- Makes legal weight: Even with a 3S battery, the weaponized bot comes in at a hair over 15oz.
Replacement & Maintenance Parts
Need spares or upgrades? These parts are compatible with the Viper V3 kit and commonly replaced in combat wear and tear. Select the variant you need from the dropdowns.
| View | Kit | Description | In Stock | Price | Buy |
|---|
Horizontal Spinner Spares and Maintenance Parts
This section highlights spare parts specific to the Horizontal spinner weapon system. Keep extras on hand to minimize downtime between matches.
| View | Kit | Description | In Stock | Price | Buy |
|---|
Basic Viper Kit – Specifications
This section details the specs for the basic Viper kit and extras. Scroll down for details on the Horizontal weapon.
| Specification | Details |
| Body Width | 16.5cm (6.5in) |
| Length | 14cm (5.5in) |
| Body Height | 3cm (1.18in) |
| Base Weight | 313g (11.04oz) |
| Motors | 2x 33.3:1 Silver Spark Gearmotors |
| Speed Controllers | 2x FingerTech tinyESC v3 |
| Wheels | 2.25×0.75in Foam Wheels with Twist Hubs |
| Chassis | 6061-T6 Aluminum (15 gauge, stamped and formed) |
| Armor | 3mm UHMW front wedge, 1.5mm polycarbonate top |
| Power Switch | Charge switch with JST connector and 6-position terminal block |
| Battery Options | Includes 9V connector AND 11.1V 300mAh LiPo |
| Battery | Rechargeable 11.1V 300mAh “Galaxy” LiPo pack |
| C6D Charger | Multi-function LiPo/NiMH AC charger with balance charging support |
| Radio Transmitter/Receiver | FlySky T6A Transmitter and TR6A Receiver |
| Extras | Motor shaft support flanged bearings, JST-9V adapter, hex wrenches |
Horizontal Spinner Weapon Kit – Specifications
This section details the included Horizontal spinner weapon system that adds high-impact offensive capability to the Viper chassis.
| Specification | Details |
| Weight | 130g with a 5.5″ titanium weapon – combined with the Viper base kit, total weight is 421g with a 3S 300mAh LiPo, or 429g with a 3S 300mAh LiPo |
| Blade Diameter | 152.4mm (6in) tip-to-tip |
| Voltage | 7.4V–11.1V. The 7.4V battery included with the Viper base kit works well, but a 3S LiPo gives your weapon extra oomph! NOT RECOMMENDED for use with 9V batteries. |
| Weapon Type | Horizontal spinner with 5.5″ titanium blade |
| Weapon Motor | F2822 1100KV Weapon motor with 4mm shaft and mounting screws** |
| Weapon Blade | Lighter weight 5.5″ titanium blade – use more weight for your bot! |
| Weapon ESC | 20A brushless ESC to control the 2822 weapon motor |
| Screws | Eight 6-32×0.25″ button head screws |
| Blade Mount | Proprietary blade mount to attach motor to weapon |
| Motor Mount | Custom F2822 motor mount to attach motor to chassis |
| H-Spinner Armor | Polycarbonate horizontal spinner armor engineered to match weapon footprint |
| Installation | Easy drop-in installation on Viper chassis with included horizontal spinner armor |
| Instructions | Written instructions included in kit bag and downloadable |
| Safety Note | Use only in enclosed arena or test box, with active weapon lock |
** Note: Select the 4mm shaft version of the 2822 motor for compatibility with the included support bearing and drum pulley.
** Note: Find the Weapon Lock here. Most competitions require a weapon lock. Convenient!
Frequently Asked Questions
Is this a complete combat robot?
Yes! The base Viper V3 kit includes everything needed to drive—motors, speed controllers, chassis, wheels, and armor, a radio system, battery, charger, weapon, and armor. Everything you need to get started.
What makes Viper V3 different from V2?
V3 features a redesigned baseplate with expanded mounting options, lighter and stronger front armor, lighter and stronger twist Hubs, reinforced motor shaft supports, upgraded ESCs, and clearer build instructions. It’s stronger, smarter, and more mod-friendly than ever.
| Category | Viper V2 | Viper V3 |
|---|---|---|
| Baseplate | 6061-T6 stamped aluminum, baseplate only | Upgraded with side/rear armor mounts, better threaded inserts |
| Motors | 2x 22.2:1 or 33.3:1 Silver Spark | Same as V2 |
| Motor Controllers | tinyESC v2 | tinyESC v3 (better BEC, safer calibration) |
| Wheels | 2.25″ Snap Wheels with Snap Hubs | Same as V2 |
| Hubs | Lightweight Twist Hubs (glass-filled nylon) | Same as V2 |
| Power Switch | 9V Adapter + Switch/charge jack (unplug to turn the bot on) | Same as V2 |
| Terminal Blocks | 4-port Mini Terminal Blocks | 6-port Mini Terminal Blocks (power extra devices) |
| Low Voltage Alarm | Not included | Same as V2 |
| Front Armor | 3mm Polycarbonate wedge | 3mm UHMW wedge (lighter + stronger) |
| Top Armor | 1.5mm Polycarbonate | Same as V2 |
| Ball Bearings for Shaft Support | Not included | MF63zz 3mm Flanged Ball Bearings included |
| Radio Option | Optional bundle (T6A + TR6A) | Same as V2. Radio included in this bundle |
| Battery Option | 9V battery connector; optional LiPo bundle | Same as V2. LiPo included in this bundle |
| Weight (base) | 313g (11.04oz) | Same as V2 |
| Dimensions (L x W x H) | 14 x 16.5 x 3cm | Same as V2 |
| Documentation | Printed instructions included | Updated digital instructions (V3 and pre-June ’25) |
Is the Viper good for beginners?
Absolutely. It’s designed to be approachable for newcomers while still offering expandability for advanced builders. Ages 10+ (6+ with a parent) are recommended.
What kind of batteries does it use?
It can run on a disposable or rechargeable 9V battery—but we don’t recommend that for combat with this weapon. We suggest using a 9V only for initial testing of a non-weaponized bot, to reduce risk if the wiring isn’t perfect yet. We recommend the powerful 11.1V 300mAh 3S LiPo pack (included in this kit).
Does this version include a battery?
Yes! This bundle includes a FingerTech Galaxy 300mAh 3S LiPo battery—lightweight, rechargeable, and powerful enough to support both drive and weapon systems.
Does this version include a charger?
Yes! This kit includes a high-quality C6D LiPo charger designed for safety and ease of use. It works with the included FingerTech Galaxy 3S battery and is compatible with most 2S and 3S LiPos—so you can charge and battle without hassle.
Does it include a transmitter or receiver?
Yes! This bundle has everything you need and includes a full 6-channel radio system. If you already have a transmitter and receiver, you can buy just the base kit and the vertical spinner weapon and armor and configure your own.
Can I add a different weapon later?
Yes! The Viper chassis supports add-on kits including spinners and lifters. You can start with the Horizontal spinner and switch to other weapons as you gain experience. FingerTech weapon kits include this horizontal spinner (included in this kit), a vertical spinner, a lifter, and a tail spinner.
Is the Viper V3 compatible with V2 accessories?
Yes, nearly all V2 add-ons and accessories work with V3, including weapon kits and radio bundles.