Series 7

Construction Crab Mech

Series 7
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284Unique parts
1,560Total parts

The future of construction vehicles is here ! This multipurpose mech can work on all terrains thanks to its six legs, and can be twice as efficient as your usual machine with its two independent and fully articulated arms ! Attach the tool of your choosing, and you're ready to work ! You can grab, drill, cut, or dig, with a single machine ! And if you need help on the construction site, the remote controlled crab drone is here !


  • With the claws on, the mech measures 39.4 x 33.3 x 18.5 studs / 12.4 x 10.5 x 5.8in / 31.5 x 26.6 x 14.8cm (L x W x H)

  • The steel beam measures 36 studs / 11.3in / 28.8cm long and can be split in three sections.

  • The drone crab measures 9.7 x 9.1 x 5 studs / 3 x 2.9 x 1.6in / 7.7 x 7.3 x 4cm (L x W x H)

  • The model comes with three minifigs : a pilot, a copilot, and a drone operator.

  • The mech can use five functional tools : two claws, a bucket, a drill, and a circular saw blade.

  • Open the windscreen to access the cockpit, with seats and coffee for the pilot and the copilot.

  • The front and back legs can move back and forth, and the arms are fully articulated.
  • All comments (20)
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 17, 2025, 2:47 PM EST
Thanks everyone ! @Architectural : it's the spotlights / eyes. :D And perhaps the rounded shapes everywhere too.
Nordmann
Niedersachsen, Germany
Nordmann
Niedersachsen, Germany
Feb 17, 2025, 2:15 AM EST
This is my favourite! I love how bulky it looks, I totally believe it could bend that beam no problem. The interchangeable claws are excellent!
giorgioChronas
Wien, Austria
giorgioChronas
Wien, Austria
Feb 17, 2025, 12:22 AM EST
A great idea & concept. Overall good looking and great playability. Good job!
Architectural
Nova Scotia, Canada
Architectural
Nova Scotia, Canada
Feb 16, 2025, 11:16 PM EST
Incredible that this manages to give off 'grunt' and 'cute' in equal measure! I hope this makes it through-
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 16, 2025, 10:33 AM EST
Thank you ! :)
Spiderkid00
Occitanie, France
Spiderkid00
Occitanie, France
Feb 12, 2025, 5:40 PM EST
Very good for space theme !!!
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 12, 2025, 12:44 PM EST
@Gilgalas : Yes it could work ! I initially though of it as a model that would work on a futuristic Earth, but it can also be seen as a Space model that can be used on other planets or asteroids, or as you mention as an underwater vehicle. I like the idea of a very polyvalent robot. :)
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 12, 2025, 12:41 PM EST
@Askymojo : thank you ! ITo be honest I'm not a fan of the idea of making series, I like to try different ideas, but I also really like the concept of robots inspired by animals, like in the Horizon games, so there might be more if I find good ideas, but probably not in the immediate future.
Gilgalas
Centre-Val de Loire, France
Gilgalas
Centre-Val de Loire, France
Feb 12, 2025, 12:13 PM EST
I need this so much for building my underwater bases !
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 12, 2025, 7:45 AM EST
@Daystop : sadly it's not possible to edit the page once it's published, and it annoys me a bit because I couldn't take photos of the model before the deadlines, so I had to use renders, but you can see them here : https://www.flickr.com/gp/leewanlego/C1AzGg4t3r
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 12, 2025, 7:43 AM EST
@Thanisse : It looks like it's easier to make a castle model that pleases a lot of people than a sci-fi model, because they seem to be a bit more specific. Which is actually why I chose to build a crab, it's a rather popular subject among MOC builders, so hopefully it will appeal to a lot of people.
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Designer
BDP Finalist
Leewan
Hauts-de-France, France
Feb 12, 2025, 7:39 AM EST
Thank you everybody ! :D
Askymojo
Colorado, USA
Askymojo
Colorado, USA
Feb 12, 2025, 1:55 AM EST
So cool. I really wish there was a whole Space series with designs like this.
AMD1979
Oklahoma, USA
AMD1979
Oklahoma, USA
Feb 11, 2025, 9:05 PM EST
Looks great! Refreshing build.
Daystop
Pays de la Loire, France
Daystop
Pays de la Loire, France
Feb 11, 2025, 5:43 PM EST
Really, really good. Will upvote it to the max. Can you switch the 1st pic with another ? I don't think it the most appealling imho. GL to you.
slideawaybrit
England, United Kingdom
slideawaybrit
England, United Kingdom
Feb 11, 2025, 4:38 PM EST
cuteee
Undo
Primorje-Gorski Kotar, Croatia
Undo
Primorje-Gorski Kotar, Croatia
Feb 11, 2025, 12:07 PM EST
Very cool!
Ikkad
Metro Manila, Philippines
Ikkad
Metro Manila, Philippines
Feb 11, 2025, 2:36 AM EST
I love the strong industrial feel of this guy!
Thanisse
Romania
Thanisse
Romania
Feb 10, 2025, 5:32 PM EST
I love this set. Seems like it's a contender for space (finally). Hope you get the votes!
Namsey
Nouvelle-Aquitaine, France
Namsey
Nouvelle-Aquitaine, France
Feb 10, 2025, 3:47 PM EST
very fun and original

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