Ninjago
7+
Arin’s Spinjitzu Battle Mech
Release date:
Jun 1, 2025
The LEGO 71839 Arin’s Spinjitzu Battle Mech is part of the NINJAGO: Dragons Rising lineup, released in August 2025, with a total of 213 pieces and recommended for ages 7 and up. The main attraction is a battle mech that stands around 16 centimeters tall, fully articulated in the arms, legs, and torso, with a central cockpit that fits the Arin minifigure. This model is part of a new wave of modular mechs that allow you to swap parts — arms, legs, torsos — with other sets in the same series, such as Kai, Sora, or Cole’s mechs. This adds clear value for customization and replayability. Priced between €20 and €23, it offers solid value for money and is well positioned in the current Ninjago offering.
213
71839
3
19.99
Minifigure review
The set includes two main minifigures and one bonus figure. Arin (njo0972) comes with a brand-new yellow ninja outfit with detailed printing on both the torso and back, plus a translucent crystal katana that reflects the new energy introduced in the Dragons Rising storyline. The figure is exclusive to this set and very well designed, with a facial expression that captures the character’s personality perfectly. The villain is a Spectral Dragonian Warrior (njo0973), with a translucent armor design in shades of purple and grey, wielding a large sword. This is another exclusive figure that looks great and adds a strong visual contrast. For the price point, it’s a fantastic minifigure to add to any Ninjago collection. The set also includes Baby Riyu — a small, molded dragon creature. It’s non-articulated but detailed and charming, and fans of the series will appreciate the inclusion. Overall, the minifigures are one of the strongest parts of this set: exclusive, well-crafted, and with solid collector appeal.
About the
set
The build is simple, direct, and suited to its target audience, but still interesting enough to appeal to mech fans of all ages. Visually, the model makes a strong impact with a bold yellow and gold color scheme accented with black details, instantly recognizable as Arin’s mech. The articulation is surprisingly good for a set in this price range. The mech can rotate its torso, bend its knees, and move its arms freely, making it great for both play and display. It’s a sturdy build, and the balance between aesthetics and function is well struck. That said, the set doesn’t include any advanced play features like launchers or hidden gimmicks, which might be disappointing if you’re looking for something more interactive. Still, the fact that you can disassemble the mech and combine parts with others in the same line gives it longer play value and makes it more versatile than it first appears.
Box design
The box is compact and practical, with a front design showing the mech in an action pose, flanked by the included minifigures. The background sets a mystical battle tone, in line with the Dragons Rising aesthetic. The back of the box highlights the ability to swap parts with other mechs in the series, encouraging collection and customization. It’s a standard modern Ninjago presentation — bold, clear, and eye-catching both on a shelf and in stores.
Instruction manual
So…
LEGO 71839 Arin’s Spinjitzu Battle Mech is a small but smart set. It offers solid articulation, a striking look, compatibility with other models, and exclusive minifigures — all at a very reasonable price. It doesn’t break new ground, but it makes the most of its size and budget. It’s a great entry point into the new wave of Ninjago mechs and a strong choice whether you’re building to play or to display. If you’re looking for a mech with unique figures, good design, and customization potential, this set delivers. If you expect advanced functions or innovative mechanics, it might fall a bit short. But overall, it’s a fun, well-balanced, and cohesive set that fits right into the current Ninjago universe.
