LEGO NINJAGO Arin’s Spinjitzu Battle Mech 71839
Build Arin’s posable battle mech with a rotating torso, opening cockpit, 2 large swords, Baby Riyu and 2 minifigures for ninja combat play.
Estimated delivery: Fri Sep 11 - Tue Sep 15, 2026
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Price $15.52. Availability: In stock.
Product Description
Recreate action-packed scenes from season 3 of NINJAGO Dragons Rising with the LEGO NINJAGO Arin’s Spinjitzu Battle Mech Building Set 71839. This 213-piece ninja playset includes a fully posable mech, two minifigures and Baby Riyu for imaginative hero-versus-villain adventures. The battle mech features adjustable arms and legs that can be tilted and twisted into dynamic poses. Its upper body rotates, allowing children to change the direction of attacks and create dramatic combat stances. Open the mech’s chest to place the Arin minifigure inside the cockpit. Two large sword accessories equip the machine for close-range battles against the included Spectral Dragonian Warrior. Arin carries a crystal katana, while the villain includes a sword for creating ninja duels. The Baby Riyu model adds another familiar Dragons Rising character for rescue missions and storytelling. Selected body sections and weapons can be mixed with compatible customizable LEGO NINJAGO mechs sold separately, letting children create their own upgraded battle-machine designs. Standing over 6.5 inches tall, the completed mech is suitable for active play or NINJAGO-themed display. Builders can also use the LEGO Builder app to view the model in 3D and track their construction progress.
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Warnings
- Contains small parts. Choking hazard. Not suitable for children under 3 years.



