★★★★★
Great set to purchase for 8-10 year old.
Taylor—January 12, 2026✓ Verified purchase
My son loves this set. This might be the only set that he has put together and didn't take it apart. He has it sitting up in his room since day one. Read more
LEGO
LEGO NINJAGO The Fire Knight Mech Building Set - Model Kit with Kai Minifigure from Legends Monstrosity -
$119.99
About this item
- LEGENDARY NINJAGO BATTLE – Teens, 14 years old and up, build The Fire Knight Mech (71846) locked in combat with an ancient sea monster
- MODEL BUILDING KIT – Both the mech and sea monster can be posed for endless pretend battles or displayed as fan-built art
- LEGO NINJAGO MINIFIGURE – Caped warrior Kai wields his magical sword inside the mech while a fisherman watches the action from his boat
- BUILD, PLAY, & DISPLAY – Teens create an impressive piece of room decor that can be removed from its base for mech adventures
- GIFT FOR TEEN BOYS & GIRLS – Makes a perfect birthday present or cool special-occasion gift for teenage NINJAGO fans who love LEGO building toys
- LEVEL-UP BUILDING SKILLS – The LEGO Builder app provides an intuitive guide where builders can zoom in, rotate models in 3D, and track their progress
- DIMENSIONS – This 996-piece model stands over 10 in. (26 cm) tall on its display stand with spear
$119.99
In Stock
Delivery — Estimated 3–5 business days · Final delivery speed and cost are confirmed at checkout
Easy Returns · 30-day window
This order is a gift
In Stock
Secure
Checkout
Free
Returns
30-Day
Guarantee
Secure checkoutAll transactions are SSL-encrypted. Your payment info is never stored.
Free returnsReturn or replace within 30 days
Fast deliveryOrders ship within 1 business day and arrive in 4–8 days.
Buyer protectionIf your order arrives damaged or doesn't show up, we'll make it right.
24/7 supportOur team is here to help. Reach us anytime by email or chat.
Ships fromOur Warehouse
Returns
Easy Returns30-day return window
PaymentsSecure transaction
Currently unavailable
Easy Returns · 30-day window
Technical specifications
| product_dimensions | 13.94 x 14.88 x 3.7 inches |
|---|---|
| item_weight | 3.32 pounds |
| item_model_number | 6526931 |
| manufacturer_recommended_age | 14 years and up |
| best_sellers_rank | #18,629 in Toys & Games ( See Top 100 in Toys & Games ) #672 in Toy Building Sets |
| release_date | June 1, 2025 |
| manufacturer | LEGO |
Ask about this product
From the brand
Product videos
Product video 1
Customer reviews
4.8175 ratings
Customers say
Customers find this LEGO set to be a favorite ninjago set, with one noting it's fantastic for both LEGO and mecha fans.
★★★★★
Wonderful
Alexis—January 12, 2026✓ Verified purchase
Excellent my grandson was happy, and built it in a short time. Thank you Read more
★★★★★
One of the greatest NINJAGO sets ever
Alyssa Stair—August 26, 2025✓ Verified purchase
I love this set. The build is amazing, the figure is awesome, the poster is super cool. And it’s priced very well. Read more
★★★★★
Fantastic lego set
Salvatore—December 21, 2025✓ Verified purchase
A fantastic set for both lego and mecha fans. The base is awesome and when fully assembled resembles a gunplay model. Read more
★★★★★
excelente compra
carolina mendoza—January 19, 2026✓ Verified purchase
se ve super Read more
★★★★★
Lego
Maria Morales Madrigal—December 28, 2025✓ Verified purchase
Excelente lego Read more
★★★★★
Excelente producto.
Leonardo Marín—January 9, 2026✓ Verified purchase
Genial Read more
★★★★★
Super Rad
Ian—October 17, 2025✓ Verified purchase
Super cool set. Very fun to build and this one is pretty posable. The default scene is very fun and dynamic but the model stands on its own and holds a variety of poses very well so this set is pretty playable too. There weren't any pissing pieces or weird, hard to execute steps. It is a little bit more of a complicated build, so this is maybe a family build if your child is on the younger side. If you're getting it for yourself, you're going to have a great time. The poster it comes with is pretty cool too. Read more
Recently Viewed