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Set 71839 Arin's Spinjitzu Battle Mech
Ninjago

Arin's Spinjitzu Battle Mech

Arin's Spinjitzu Battle Mech is a LEGO® Ninjago set with 213 pieces and two minifigures. It centres on a posable battle mech built for the Ninjago hero Arin. Black, pearl gold and a bold bright orange give the mech its distinctive look.

Set number
71839
Year
2025
Pieces
213
Minifigures
2
Theme
Ninjago
Different parts
75
What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 75

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (10)

These extra parts come with the set in case one gets lost.

Minifigures 2

Description

A mech built for Arin

Arin is one of the heroes of Ninjago, and this set gives him a dedicated battle mech. The build is posable, with arms and legs that move into different combat stances, so the finished model works as a display piece and a play piece at once. At 213 pieces, the build is compact enough for one sitting while still delivering a mech with a strong, clear silhouette. That places the set within the wider tradition of Ninjago mechs, which favour posable joints over a static figure and let the model take on different fighting stances.

Spinjitzu-inspired play

The name points to Spinjitzu, the signature fighting style of the Ninjago world, built around characters spinning into battle. The mech carries that idea into play, giving the two included minifigures a natural setup for quick duel scenes. That makes the set a good way to add another battle scene to an existing Ninjago collection, or to build a small story of its own around Arin. Because Spinjitzu in the show is closely tied to fast, dynamic movement, the mech's posable design fits that idea well even though the model itself doesn't spin.

A black, gold and orange finish

Black and dark bluish grey form the base of the mech, with pearl gold and bright light orange used as accents. Together they give the model a bold, easily recognisable look that stands apart from vehicle or building sets in the wider LEGO® range. For anyone sorting Ninjago figures and mechs by colour, the set adds parts in this exact gold-and-orange combination. Pearl gold is used deliberately as an accent on the helmet, weapons and armour plating, while black and dark bluish grey stay in the background as a calm base tone.

75 parts for mech and scene

The mech is built from 75 unique parts, each listed with colour and quantity on this page. Combined with the two minifigures – Arin and an opponent for the battle scene – the set adds up to a compact but complete Ninjago package, with parts that also work well in custom mech builds or as additions to other Ninjago sets. Anyone who already owns other Ninjago sets can use the parts list to look specifically for gold or orange elements suited to custom builds.

FAQ

Who is Arin in this set?
Arin is one of the Ninjago heroes and the main character of this set, joined by a second minifigure as an opponent for the battle scene.
What can the battle mech do?
The mech is posable, with arms and legs that move into different combat stances, tying into the Spinjitzu theme of the Ninjago series.
How many pieces and minifigures are included?
The set includes 213 pieces and 2 minifigures, built from 75 unique parts that are all listed on this page.

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