How many pieces does the LEGO Arin's Spinjitzu Battle Mech (71839-1) have?

The LEGO Arin's Spinjitzu Battle Mech set (71839-1) contains 213 pieces. It was released in 2025 as part of the LEGO Ninjago theme.

How can I find missing parts for LEGO set 71839-1?

On BrickMissing you can check which parts from the LEGO Arin's Spinjitzu Battle Mech (71839-1) you already own. Add your LEGO collection and we'll show exactly which of the 213 pieces you're missing and which you already have.

Can I build the LEGO Arin's Spinjitzu Battle Mech with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 213 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Arin's Spinjitzu Battle Mech from?

The LEGO Arin's Spinjitzu Battle Mech (71839-1) belongs to the LEGO Ninjago theme. You can browse all Ninjago sets on BrickMissing to find more sets from this theme.

Arin's Spinjitzu Battle Mech

🏷️ 71839-1•🎨 Ninjago•📅 2025•🧱 213 parts•Easy

Engage in epic battles from NINJAGO Dragons Rising season 3 with Arin’s Spinjitzu Battle Mech (71839). This powerful mech features posable arms and legs that tilt and twist, a rotating torso, and an opening chest to place a minifigure inside. It wields 2 large sword accessories, ready for action. The set includes Arin with his crystal katana sword and a Spectral Dragonian Warrior with their own sword accessory, plus an adorable Baby Riyu model. Create your ultimate fighting machine by swapping body parts with customisable mechs from the 2024 NINJAGO range, such as Cole’s Elemental Earth Mech (71806), Sora’s Elemental Tech Mech (71807), Kai’s Elemental Fire Mech (71808) and Lloyd’s Elemental Power Mech (71817). Prepare for thrilling good versus evil confrontations!

Parts Inventory

🧱 213 parts

Part	Color	Qty
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Black	10×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Bright Light Orange	8×
Plate Special 1 x 2 with 5.9mm Centre Side Towball 14417	Dark Bluish Gray	2×
Plate Special 1 x 2 5.9mm Towball Socket 14418	Light Bluish Gray	2×
Tile Round 2 x 2 with Dragon Head, White Gear in Dark Azure Circle print 14769pr9988	Pearl Gold	1×
Slope Curved 2 x 2 x 2/3 15068	Bright Light Orange	1×
Plate Special 1 x 1 with Vertical Tooth 15070	Pearl Gold	2×
Technic Brick Special 2 x 2 with 10.2mm Balls with Holes and Axle Hole 17114	Dark Bluish Gray	1×
Plate Special Round 2 x 2 with Center Stud (Jumper Plate) 18674	Black	1×
Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard] 21459	Opal Trans-Clear	1×

Showing 10 of 86 parts

🔓 Sign up to see all parts

Slope Curved 2 x 2 x 2/3	15068	Bright Light Orange	1×
Plate Special 1 x 1 with Vertical Tooth	15070	Pearl Gold	2×
Technic Brick Special 2 x 2 with 10.2mm Balls with Holes and Axle Hole	17114	Dark Bluish Gray	1×
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)	18674	Black	1×
Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard]	21459	Opal Trans-Clear	1×
Tile Special 2 x 3 Pentagonal	22385	Pearl Gold	4×
Wedge Plate 2 x 2 Cut Corner	26601	Black	4×
Plate Special 2 x 3 with Rocks	27261	Black	5×
Brick 2 x 2	3003	Bright Light Orange	2×
Plate 2 x 4	3020	Bright Light Orange	1×
Plate 2 x 3	3021	Black	3×
Plate 2 x 2	3022	Black	4×
Plate 2 x 2	3022	Light Bluish Gray	2×
Plate 1 x 2	3023	Trans-Dark Pink	10×
Technic Axle and Pin Connector Angled #2 - 180°	32034	Reddish Brown	2×
Wedge Plate 4 x 6 Cut Corners	32059	Black	1×
Technic Axle 2 Notched	32062	Red	6×
Creature, Dragon, Baby, Dark Blue Markings, Lime Eyes print	3215pr0001	Sand Blue	1×
Slope Inverted 45° 4 x 1 Double with 1 x 2 Recessed	32802	Dark Bluish Gray	1×
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]	3484	Dark Bluish Gray	2×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Black	5×
Large Figure Weapon Sword, 3 Bar Holes and Axle Hilt	35633	Pearl Gold	1×
Bracket 1 x 1 - 1 x 1 Inverted	36840	Dark Bluish Gray	4×
Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment]	3839b	Black	2×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Dark Bluish Gray	4×
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised - Updated Version	4304	Black	4×
Wedge Plate 3 x 2 Right	43722	Bright Light Orange	2×
Wedge Plate 3 x 2 Left	43723	Bright Light Orange	2×
Bracket 1 x 2 - 2 x 2	44728	Light Bluish Gray	1×
Dish 2 x 2 Inverted [Radar]	4740	Trans-Dark Pink	1×
Wedge Curved 2 x 3 x 2/3 Two Studs, Wing End	47456	Black	1×
Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End	47457	Pearl Gold	2×
Technic Tooth 1 x 3 with Axle Hole [Hollow Underside]	48267	Pearl Gold	1×
Brick Special 1 x 2 with Rotation Joint Pin	4920	White	1×
Large Figure Cover 4 x 5 x 2 with Bar, 4 Studs, Ridged	4986	Pearl Gold	2×
Brick Special 1 x 2 with Studs on 2 Sides	52107	Black	2×
Large Figure Weapon Hook	5310	Pearl Gold	1×
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small	53451	Pearl Gold	2×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Dark Bluish Gray	2×
Wedge Plate 6 x 3 Right	54383	Black	1×
Wedge Plate 6 x 3 Left	54384	Black	1×
Technic Brick Modified 2 x 2 with Ball and Axle Hole, with 6 Holes in Ball	57909b	Black	4×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Reddish Brown	4×
Cone 1 x 1 [Top Groove]	59900	Pearl Gold	1×
Slope 65° 2 x 1 x 2	60481	Black	2×
Technic Pin with Friction Ridges Lengthwise with No Center Slots	61332	Black	2×
Plate Round 1 x 1 with Solid Stud	6141	Trans-Dark Pink	4×
Plate Round 1 x 1 with Solid Stud	6141	Pearl Gold	6×
Plate Special 1 x 2 with Clip Horizontal on End	63868	Dark Bluish Gray	2×
Flame / Headwear Accessory Plume / Feather, Triple Point	64647	Trans-Dark Pink	2×
Plate Special 4 x 4 with 2 x 2 Opening	64799	Dark Bluish Gray	1×
Weapon Hilt Symmetric	66909	Black	1×
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole, No Arm Holes	67696	Dark Bluish Gray	6×
Plate Round Corner 3 x 3 with 2 x 2 Round Cutout	68568	Black	4×
Plant / Animal Body Part, Tree / Branch / Tail / Appendage / Tentacle with Pin	69858	Light Aqua	1×
Technic Brick Special 1 x 2 with Pin Hole and 1 x 2 Plate	73109	Light Bluish Gray	2×
Plate Special 1 x 2 with Clip Vertical on End	78256	Black	2×
Plate Angled 2 x 2 with Step and Hole in Center	79846	Bright Light Orange	5×
Plate Angled 2 x 2 with Step and Hole in Center	79846	Black	1×
Large Figure Cover 4 x 3 x 2 with Bar, 4 Studs, Ridged	79896	Bright Light Orange	1×
Brick Special 2 x 5 with Slope, Studs on Side	79897	Bright Light Orange	2×
Brick Special 1 x 2 x 1 1/3 with Rotation Joint Socket	80431	Dark Bluish Gray	1×
Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style]	85080	Black	2×
Brick Special 1 x 1 with Stud on 1 Side	87087	Black	4×
Plate Special 1 x 2 with Angled Handles on Side	92692	Black	2×
Arm Mechanical with Clip [Thick Support]	98313	Pearl Gold	6×
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]	99563	Bright Light Orange	2×
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]	99563	Pearl Gold	2×
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]	99563	Black	2×
Bracket 1 x 2 - 1 x 2	99781	Pearl Gold	8×
Hair Coiled, Straight Sides	80682	Black	1×
Minifig Neckwear Bandana (Ninjago)	15619	Black	1×
Hips and Bright Light Orange Legs with Black Belt, Dark Bluish Grey Pocket, Gold Flask, Orange Knee Wraps print	970c38pr0003	Bright Light Orange	1×
Torso, Odd Arms, Black Cloak, Orange Straps, Magenta Dragon print, Left Bright Light Orange Arm, Right Black Arm, Black Hands	973e142pr0001	Bright Light Orange	1×
Minifig Head Arin, Thick Raised Eyebrows, Smirk, Stubbles print	28621pr3991	Yellow	1×
Minifig Neckwear Armour with Dragon Jaw	5985	Dark Blue	1×
Minifig Head Spectral Dragonian Warrior, Medium Azure Face, Dark Blue Lines, Red Eyes, White Fangs, Red Mouth, Medium Azure/Red Shapes in Back	28621pr9670	Light Aqua	1×
Torso, Red Belt, Silver Dragon Skull, Horns print, Trans-Light Blue Arms, Red Hands	973c65h22pr0001	Light Aqua	1×
Creature Body Part, Dragon, Head	5975	Pearl Titanium	1×
Animal Body Part, Horn (Cattle) / Tentacle / Vine / Branch / Tongue - Long	13564	Red	2×
Lower Body, Ghost with Marbled Light Aqua pattern	19859pat0016	Trans-Light Blue	1×

Build DNA

Parts inventory insights for Arin's Spinjitzu Battle Mech

213 pieces puts this build -54% against the average Ninjago set and -67% against the average 2025 release.

LEGONINJAGO

Vs average Ninjago set

-54%-247 parts

This set213

Average set460

Average Ninjago set: 460 pieces across 408 other sets.

Vs average 2025 set

-67%-425 parts

This set213

Average set638

Average 2025 set: 638 pieces across 561 other sets.

Color profile

16different colors

Dominant color

Black

Black72x

34%

Pearl Gold39x

18%

Bright Light Orange28x

13%

Dark Bluish Gray26x

12%

Unique parts

2.7 pieces per unique type

Repeat factor

Average pieces per unique type.

Most used part

Slope Curved 2 x 1 No Studs [1/2 Bow]

18x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩80unique parts🎨16different colors📊13.3avg. parts per color🏆18×Slope Curved 2 x 1 No Studs [1/2 Bow]

🎨 All Ninjago sets 📅 All sets from 2025

← Back to Buildable Sets