How many pieces are in the Ronin R.E.X.?

Ronin R.E.X. contains 547 pieces.

When was the Ronin R.E.X. released?

Ronin R.E.X. was released in 2015.

Breaking News

LEGO Retiring Soon List – October 2026 Update

The Brick Fan • about 15 hours ago

🏛 Ninjago

Set #70735

Ronin R.E.X.

The Ronin R.

Before you buy

Who it's for: Intermediate build Ninjago collectors and builders who love functional play features and rugged vehicle designs.
Build: 547 pieces · about 3.5 hours Build time is an estimate.
Price: $49.99 list price · 9.1¢ per piece
Availability: Likely retired

$49.99

Best Price

$44.99

You Save

10% OFF

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

The Ronin R.E.X. is one of the most mechanically innovative and characterful vehicles from LEGO Ninjago's legendary Possession era. Released in 2015, this rugged, asymmetric airship perfectly captures the scavenger aesthetic of the mercenary Ronin, offering a brilliant combination of robust System building and seamless Technic integration. Its crowning achievement is the built-in, trigger-activated launch mechanism that sends a rip-cord Airjitzu flyer soaring into the air, making it an absolute blast to play with.

This set is perfect for Ninjago fans who appreciate highly interactive builds and rugged, military-style sci-fi aesthetics. The assembly process is incredibly satisfying, requiring you to construct a heavy-duty carrying handle that makes the ship highly swooshable and easy to aim. It serves as both an engaging afternoon building project and an imposing, unique display piece that stands out from typical symmetrical starfighters.

Skip this if you prefer pristine, modern spacecraft or are unwilling to pay a premium on the retired market. Because this set has been retired for years and contains highly sought-after exclusive minifigures, its secondary market price is steep; budget-conscious builders might find better value in modern Ninjago dragons or core vehicles.

✨ New

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Try asking:

How does the rip-cord flyer launcher play feature work in the Ronin R.E.X.? Are the Ronin and Ghoultar minifigures exclusive to this set? Is the Ronin R.E.X. worth buying at its current retired market price? What makes the 2015 Possession theme of Ninjago so collectible?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

547

Pieces

⏱

3.5h

Estimated Build Time

📊

Intermediate

Difficulty

Build Highlights:

Integrating the functional, trigger-activated Airjitzu flyer launcher into the ship's core.
Building the incredibly sturdy, Technic-reinforced swoosh handle.
Assembling the adjustable, asymmetric wing structures and dual side-shooters.
Detailing the cockpit and rear cargo compartment for maximum playability.

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

↑ Trending up since release

A-

Investment Grade

⏳ Retired

The Ronin R.E.X. has established itself as an exceptional investment, with its secondary market value skyrocketing from its original $49.99 MSRP to over $250. This impressive growth is fueled by the enduring popularity of Ninjago Season 5 (Possession) and the high demand for its exclusive minifigure lineup. Ronin, featuring his unique dark red hat, and the beautifully detailed Ghost Scythe Master Ghoultar are major highlights that drive individual character value. While the set's value has already matured significantly, it continues to show a rising trend. The unique integration of the Airjitzu flyer gimmick makes this a highly memorable novelty that collectors actively seek out. However, prospective investors should note that buying in at the current high market price limits the potential for explosive future percentage gains, though it remains a highly stable and desirable asset for any serious LEGO portfolio.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

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📦 Parts Inventory

Piece count: 547
Parts cataloged in this inventory: 177 unique parts, 527 pieces
Minifigures: 4

The piece count includes the 20 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Bracket 1 x 2 - 1...

Part #: 10201 2× Light Bluish Gray

Flag 2 x 2 Square...

Part #: 11055 1× Light Bluish Gray

Bar Holder with Clip

Part #: 11090 1× Black

Brick Curved 4 x ...

Part #: 11153 2× Dark Red

Technic Axle Pin ...

Part #: 11214 6× Dark Bluish Gray

Plate Special 1 x...

Part #: 11458 6× Dark Bluish Gray

Brick Curved 2 x ...

Part #: 11477 2× Dark Blue

Brick Curved 2 x ...

Part #: 11477 4× Red

Brick Curved 2 x ...

Part #: 11477 1× Yellowish Green

Brick Wedged, Slo...

Part #: 13269 1× Dark Bluish Gray

Plate Special 1 x...

Part #: 14704 5× Light Bluish Gray

Tile Round 2 x 2 ...

Part #: 14769 2× Pearl Gold

Brick Curved 2 x ...

Part #: 15068 1× Dark Blue

Brick Curved 2 x ...

Part #: 15068 2× Dark Green

Tile Special 1 x ...

Part #: 15209 2× Yellowish Green

Launcher, Weapon ...

Part #: 15391 2× Black

Launcher Trigger,...

Part #: 15392 2× Dark Bluish Gray

Plate Special 2 x...

Part #: 15456 1× Black

Technic Axle 5 wi...

Part #: 15462 2× Dark Tan

Tile Special Roun...

Part #: 15535 1× Tan

Plate Special 1 x...

Part #: 15573 2× Dark Blue

Tile Special 1 x ...

Part #: 15712 2× Dark Bluish Gray

Rip Cord Flexible...

Part #: 16965 1× Black

Wave / Flame Roun...

Part #: 18395 1× Yellowish Green

Wave / Flame Roun...

Part #: 18396pat0002 2× Dark Blue

Technic Gear 20 T...

Part #: 18575 1× Tan

Brick Special 2 x...

Part #: 18585 1× Black

Gearwheel 8 Tooth...

Part #: 18590 1× Black

Windscreen 4 x 4 ...

Part #: 18591 1× Trans-Clear

Propeller 3 Blade...

Part #: 18592 1× Pearl Gold

Plate Special 1 x...

Part #: 18649 1× Black

Technic Pin Conne...

Part #: 18654 2× Dark Bluish Gray

Weapon Sword Serr...

Part #: 19858pat0002 1× Trans-Neon Green

Creature, Ghost, ...

Part #: 19861pr0002 1× Trans-Neon Green

Plate Special 1 x...

Part #: 20612 1× Trans-Brown

Weapon Sword / Ka...

Part #: 21459 2× Black

Weapon Sword / Ka...

Part #: 21459 5× Pearl Gold

Weapon Sword / Ka...

Part #: 21459 1× Yellowish Green

Tile Special 1 x ...

Part #: 2412b 8× Pearl Gold

Wedge Plate 3 x 6...

Part #: 2419 1× Black

Wedge Plate 3 x 6...

Part #: 2419 3× Dark Bluish Gray

Brick 2 x 6

Part #: 2456 1× Black

Barrel 2 x 2 x 2

Part #: 2489 2× Reddish Brown

Plate Special 1 x...

Part #: 2540 5× Dark Bluish Gray

Plate Special 1 x...

Part #: 2540 1× Light Bluish Gray

Plate Round 2 x 2...

Part #: 2654 2× Red

Technic Pin with ...

Part #: 2780 6× Black

Brick Special 1 x...

Part #: 2877 4× Black

Lever Small Base ...

Part #: 298c02 2× Red

Brick 1 x 2

Part #: 3004 1× Tan

Brick 1 x 6

Part #: 3009 1× Dark Bluish Gray

Brick 1 x 4

Part #: 3010 1× Dark Bluish Gray

Brick 1 x 4

Part #: 3010 2× Light Bluish Gray

Equipment Binoculars

Part #: 30162 2× Pearl Gold

Plate 2 x 4

Part #: 3020 3× Dark Bluish Gray

Part #: 3021 1× Dark Blue

Plate 2 x 2

Part #: 3022 7× Reddish Brown

Plate 1 x 2

Part #: 3023 2× Trans-Neon Green

Plate 1 x 2

Part #: 3023 2× Dark Green

Plate 1 x 2

Part #: 3023 14× Red

Plate 4 x 6

Part #: 3032 1× Dark Bluish Gray

Plate 6 x 10

Part #: 3033 1× Dark Bluish Gray

Leg Mechanical - ...

Part #: 30362 2× Black

Brick Sloped 45° ...

Part #: 3049d 1× Black

Brick Special 1 x...

Part #: 30526 1× Light Bluish Gray

Brick Curved 2 x ...

Part #: 30602 2× Dark Bluish Gray

Tile 2 x 2 with A...

Part #: 3068bpr0166 1× Light Bluish Gray

Plate Special 3 x...

Part #: 3176 10× Light Bluish Gray

Technic Pin 3/4

Part #: 32002 4× Tan

Technic Beam 1 x ...

Part #: 32009 4× Black

Technic Pin Long ...

Part #: 32054 6× Red

Technic Pin Long ...

Part #: 32054 4× Light Bluish Gray

Technic Axle 2 No...

Part #: 32062 2× Red

Technic Brick 1 x...

Part #: 32064a 2× Light Bluish Gray

Technic Bush 1/2 ...

Part #: 32123b 1× Yellow

Technic Beam 2 x ...

Part #: 32140 4× Black

Part #: 32270 4× Black

Technic Beam 1 x ...

Part #: 32278 2× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 32449 2× Red

Technic Gear 36 T...

Part #: 32498 1× Black

Technic Beam 1 x ...

Part #: 32523 2× Black

Technic Beam 1 x ...

Part #: 32524 1× Black

Technic Brick 6 x...

Part #: 32532 1× Light Bluish Gray

Food Turkey Drums...

Part #: 33057 1× Dark Orange

Plate 1 x 8

Part #: 3460 3× Dark Bluish Gray

Plate 1 x 3

Part #: 3623 2× Dark Bluish Gray

Plate 1 x 6

Part #: 3666 2× Light Bluish Gray

Technic Brick 1 x...

Part #: 3700 4× Dark Bluish Gray

Part #: 3705 1× Black

Technic Axle 8

Part #: 3707 6× Black

Plate 1 x 4

Part #: 3710 6× Dark Red

Technic Bush

Part #: 3713 4× Red

Technic Plate 2 x...

Part #: 3738 1× Dark Bluish Gray

Part #: 3943b 4× Dark Bluish Gray

Dish 4 x 4 Invert...

Part #: 3960 1× Dark Bluish Gray

Plate Round 2 x 2...

Part #: 4032a 6× Red

Plate Round 2 x 2...

Part #: 4032a 1× Dark Bluish Gray

Brick Special 1 x...

Part #: 4070 12× Reddish Brown

Plate Special 1 x...

Part #: 4085c 12× Black

Propeller 8 Blade...

Part #: 41530 2× Flat Silver

Brick Wedged, Cur...

Part #: 41747 1× Dark Bluish Gray

Brick Wedged, Cur...

Part #: 41748 1× Dark Bluish Gray

Brick Wedged, Cur...

Part #: 41749 2× Dark Red

Brick Wedged, Cur...

Part #: 41750 2× Dark Red

Wedge Plate 4 x 2...

Part #: 41769 1× Light Bluish Gray

Wedge Plate 4 x 2...

Part #: 41770 1× Light Bluish Gray

Technic Axle and ...

Part #: 42003 1× Yellow

Technic Axle and ...

Part #: 42003 2× Light Bluish Gray

Technic Pin 1/2 w...

Part #: 4274 2× Light Bluish Gray

Technic Axle Pin ...

Part #: 43093 2× Blue

Box 2 x 2 x 2 [Ho...

Part #: 4345b 2× Light Bluish Gray

Box 2 x 2 x 2 Doo...

Part #: 4346 2× Trans-Clear

Brick Wedged, Cur...

Part #: 43712 1× Dark Bluish Gray

Brick Wedged, Cur...

Part #: 43713 1× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 43857 1× Light Bluish Gray

Hinge Plate 1 x 4...

Part #: 44568 1× Light Bluish Gray

Hinge Plate 3 x 4...

Part #: 44570 1× Dark Bluish Gray

Bracket 1 x 2 - 2...

Part #: 44728 2× Dark Bluish Gray

Brick Wedged, Cur...

Part #: 45301 2× Dark Red

Brick Round 1 x 1...

Part #: 4588 3× Dark Bluish Gray

Bracket 3 x 2 - 2...

Part #: 4598 1× Black

Dish 2 x 2 Invert...

Part #: 4740 3× Trans-Light Blue

Brick Sloped Inve...

Part #: 4871 2× Dark Bluish Gray

Bar 1L with Clip ...

Part #: 48729b 1× Black

Brick Wedged, Slo...

Part #: 48933 2× Dark Green

Technic Pin Conne...

Part #: 48989 3× Light Bluish Gray

Wedge Plate 8 x 3...

Part #: 50304 2× Dark Bluish Gray

Wedge Plate 8 x 3...

Part #: 50305 2× Dark Bluish Gray

Wheel Arch, Mudgu...

Part #: 50745 4× Red

Engine / Air Scoo...

Part #: 50943 4× Dark Red

Brick Curved 3 x ...

Part #: 50950 2× Dark Green

Animal Body Part,...

Part #: 53451 4× Flat Silver

Animal Body Part,...

Part #: 53451 1× Yellowish Green

Animal Body Part,...

Part #: 53451 3× Red

Brick Sloped 30° ...

Part #: 54200 1× Yellowish Green

Brick Sloped 30° ...

Part #: 54200 4× Dark Green

Technic Pin Conne...

Part #: 55615 1× Light Bluish Gray

Technic Brick Spe...

Part #: 57909b 2× Dark Brown

Technic Axle 5.5 ...

Part #: 59426 1× Dark Bluish Gray

Cone 1 x 1 [Top G...

Part #: 59900 2× Pearl Gold

Wheel 31 x 15 Tec...

Part #: 60208 2× Dark Red

Plate Special 1 x...

Part #: 60470b 1× Black

Plate Special 1 x...

Part #: 60478 6× Dark Bluish Gray

Brick Sloped 65° ...

Part #: 60481 2× Light Bluish Gray

Technic Beam 1 x ...

Part #: 60483 2× Black

Panel 1 x 4 x 3 [...

Part #: 60581 2× Light Bluish Gray

Brick Sloped 18° ...

Part #: 61409 2× Reddish Brown

Plate Round 1 x 1...

Part #: 6141 14× Pearl Gold

Plate Round 1 x 1...

Part #: 6141 12× Dark Bluish Gray

Plate Round 1 x 1...

Part #: 6141 8× Red

Plate Round 1 x 1...

Part #: 6141 4× Trans-Clear

Container Box 2 x...

Part #: 61780 1× Reddish Brown

Bar 1 x 4 x 3 [En...

Part #: 62113 2× Black

Tail Shuttle

Part #: 6239 2× Red

Tile 1 x 3

Part #: 63864 2× Light Bluish Gray

Plate Special 1 x...

Part #: 63868 8× Black

Plate Special 1 x...

Part #: 63868 2× Reddish Brown

Technic Axle and ...

Part #: 63869 2× Light Bluish Gray

Weapon Lightsaber...

Part #: 64567 1× Pearl Gold

Weapon Lightsaber...

Part #: 64567 4× Light Bluish Gray

Technic Pin Long ...

Part #: 6558 8× Blue

Technic Axle 3 wi...

Part #: 6587 3× Dark Tan

Technic Gear 12 T...

Part #: 6589 2× Tan

Technic Pin with ...

Part #: 6628 4× Black

Large Figure Skel...

Part #: 74261 2× Dark Bluish Gray

Hose, Ribbed 7mm ...

Part #: 78c02 2× Flat Silver

Hose, Ribbed 7mm ...

Part #: 78c18 2× Flat Silver

Technic Pin Conne...

Part #: 85940 2× Black

Technic Brick 1 x...

Part #: 85943 5× Dark Bluish Gray

Technic Axle 4 wi...

Part #: 87083 4× Dark Bluish Gray

Technic Pin Conne...

Part #: 87408 2× Black

Plate Special 2 x...

Part #: 87580 2× Light Bluish Gray

Plate Special 2 x...

Part #: 87580 1× Dark Blue

Plate Special 1 x...

Part #: 88072 2× Black

Large Figure Skel...

Part #: 90612 2× Black

Plate Special 1 x...

Part #: 92593 1× Light Bluish Gray

Bar 1L with Top S...

Part #: 92690 1× Reddish Brown

Brick Round 2 x 2...

Part #: 92947 2× Red

Weapon Sword Kata...

Part #: 93055 2× Pearl Gold

Hat, Conical Asia...

Part #: 93059 3× Pearl Gold

Brick Curved 4 x ...

Part #: 93273 4× Dark Red

Technic Axle Conn...

Part #: 93571 2× Dark Bluish Gray

Weapon Pike / Spe...

Part #: 93789 1× Black

Windscreen 12 x 6...

Part #: 94531 1× Trans-Clear

Brick and Axle Se...

Part #: 96874 1× Orange

Weapon Sword, Big...

Part #: 98137 2× Pearl Gold

Tile Round 1 x 1

Part #: 98138 1× Trans-Red

Tile Round 1 x 1

Part #: 98138 1× Trans-Light Blue

Weapon Sai

Part #: 98139 1× Flat Silver

Weapon Scythe / C...

Part #: 98141 2× Yellowish Green

Weapon Scythe / C...

Part #: 98141 2× Pearl Gold

Bracket 1 x 2 - 2...

Part #: 99207 6× Black

Bracket 1 x 2 - 1...

Part #: 99780 5× Black

Bracket 1 x 2 - 1...

Part #: 99780 4× Dark Bluish Gray

Bracket 1 x 2 - 1...

Part #: 99781 4× Light Bluish Gray

🧱 Sticker Sheet for...

Part #: 21038 1× [No Color/Any Color]

Community Insights

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BlockTalk AI

The Hidden Brick's unboxing of the Ronin R.E.X. set 70735 showcases the box contents and focuses on the minifigures included in the first bag. As part 1 of a build series, the video initiates the construction process, starting with the minifigures.