Gear up for high-stakes elemental action with the LEGO NINJAGO Arin’s Spinjitzu Battle Mech (71839). Inspired by Season 3 of NINJAGO: Dragons Rising, this 213-piece build gives young ninjas a fully posable warrior clad in vibrant orange armour and jade-trimmed blades—ready to spin, slash and defend the realms.
The mech’s rotating torso lets kids unleash signature Spinjitzu moves, while adjustable arms, legs and shoulder joints strike dynamic battle poses. Flip open the chest cockpit to seat Arin at the controls and charge into combat with twin oversized swords that clip neatly onto the forearms for swift weapon swaps.
Builders can upgrade the action by swapping limbs and armour plates with other 2024 customisable mechs (each sold separately), creating the ultimate fusion fighter for any mission. When the dust settles, display the mech in a victorious stance—its angular silhouette and translucent blade accents catch the light on any shelf.
The adventure continues with two minifigures and a fan-favourite companion:
Arin – Wields a crystal katana and dons dual-tone ninja gear.
Spectral Dragonian Warrior – Brandishes a wicked sword and spectral armour detailing.
Baby Riyu – The lovable dragon hatchling who inspires daring rescue missions.
Connect to the LEGO Builder app to zoom, rotate and track progress in 3-D, making every step of the build intuitive and fun.
Key Features
Fully posable mech: Rotating waist, tilting cockpit, and articulated limbs for cinematic poses.
Weaponised for battle: Two giant swords, a crystal katana and villain blade spark epic duels.
Modular customisation: Mix-and-match parts with other Elemental Mechs for unique creations.
Story-ready cast: Includes Arin, Spectral Dragonian Warrior and Baby Riyu for good-vs-evil play.
Perfect gift: A confidence-boosting build for birthdays, holidays or any ninja-worthy occasion.