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LEGO Ninjago 71720 Fire Stone Mech

2020977 pieces5 minifigures

LEGO 71720 Fire Stone Mech

Specifications

Set number71720
Release year2020
Piece count977
Minifigures5
ThemeNinjago
Building instructionsDownload the instructions on lego.com

Where to buy set 71720

Also on: Amazon.co.uk · Amazon.ca

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LEGO set 71720, Fire Stone Mech, depicts a large mech associated with fire and stone within the Ninjago theme.

Fire Stone Mech belongs to the Ninjago theme and focuses on a battle mech as its main build. The subject fits the line’s established mix of ninja heroes, elemental imagery and mechanical designs used for action scenes and confrontations.

The build is centred on a large mech form, intended to act as the main visual and play element of the set.

The set is suitable for character-based play, with heroes and opponents included for direct conflict scenarios. It can also serve as part of a Ninjago collection, where it sits naturally among the theme’s mech, vehicle and combat-machine builds rather than location-focused sets.

Inventory of set 71720

The inventory of set 71720 lists 977 pieces, spare parts excluded: 273 different lots (one shape in one color) for 211 part shapes. The box also contains 25 spare parts, for small elements that are easy to lose.

Colors of set 71720

Main color: red, making up 20% of the parts, followed by dark bluish gray (18%) and pearl gold (15%).

ColorPartsShare
Red19320%
Dark Bluish Gray17418%
Pearl Gold14515%
Light Bluish Gray13914%
Black10511%
Tan676.9%
Dark Tan505.1%
Lime181.8%
Blue161.6%
Dark Red141.4%
Other colors (10)555.6%

Part types

TypePartsShare
Plates Special22923%
Plates17718%
Bricks Sloped868.8%
Bricks Curved626.3%
Bricks Wedged505.1%
Tiles Special474.8%

Most common parts in set 71720

PartColorQuantity
Plate 1 x 2 3023Tan39
Bracket 1 x 2 - 2 x 2 44728Dark Bluish Gray33
Plate Special 1 x 2 Side Handle [Free Ends] 2540Pearl Gold24
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] 99563Pearl Gold24
Plate Round 1 x 1 with Open Stud 85861Pearl Gold22
Bracket 1 x 2 - 1 x 2 Inverted 99780Dark Tan20
Plate 2 x 4 3020Dark Bluish Gray19
Plate 2 x 4 3020Red16
Plate 2 x 2 3022Lime16
Plate 2 x 2 Corner 2420Dark Tan15

188 of the 211 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 71720

2 part shapes in set 71720 appear in no other set in the catalog, most often printed elements, stickers or molds specific to the model. If one gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set. Counting colors, 3 lots in the set are not found in any other set.

PartColor
Sticker Sheet for Set 71720-1 67955
Large Figure Shoulder Cover, Armor, Round, Smooth with Gold Decorations print 21560pr0017Red

No similarly sized set supplies more than a quarter of its parts: set 71720 relies on a little-shared assortment.

Size of set 71720 within its line

With 977 pieces, set 71720 ranks #53 out of 396 Ninjago sets in our database, which have an average of 470 parts. Among the 490 sets released in 2020, it ranks #51. That is 2.1 times the average Ninjago set size.

Frequently asked questions

How many pieces does LEGO set 71720 Fire Stone Mech have?

LEGO set 71720 Fire Stone Mech has 977 pieces. It was released in 2020 as part of the Ninjago theme.

What year was LEGO set 71720 released?

Set 71720 Fire Stone Mech was released in 2020 and belongs to the Ninjago theme.

Which minifigures are included in set 71720?

Number of minifigures in LEGO set 71720 Fire Stone Mech: 5. Their names and quantities are listed in the “Included minifigures” section.

Where can I find the building instructions for set 71720?

The instructions for LEGO set 71720 Fire Stone Mech can be downloaded free as a PDF from the official lego.com website, under “Building Instructions”, by entering the number 71720.

What is the main color of LEGO set 71720?

Red, with 193 out of 977 pieces, or 20%. Next come dark bluish gray (18%) and pearl gold (15%).

How many different parts does set 71720 contain?

Set 71720 has 273 different lots (one shape in one color), covering 211 part shapes. Most common part: Plate 1 x 2 in tan, with 39 copies.

Does LEGO set 71720 contain any exclusive parts?

Yes: 2 part shapes exist in no other set, for example: Sticker Sheet for Set 71720-1.

Set number71720
Release year2020
ThemeNinjago
Piece count977
Minifigures5
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-30