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Every order is backed by our 100% Free Missing Parts Guarantee. If any piece is missing, contact support and we ship the replacement parts directly to your door at zero cost.

How fast is worldwide delivery and is tracking provided?

All orders are dispatched within 1-2 business days with full end-to-end door tracking provided via email.

Mouldking 12031 Union Pacific UP844 Steam Locomotive (3357 Pieces)

Q: Are the building bricks in the Mould King Union Pacific UP844 Steam Locomotive (3357 Pieces) set 100% compatible with standard sets?

Yes, all building pieces, minifigures, and MOC parts feature standard high-precision micro-tolerance clutch power and are 100% compatible with major building brick brands.

Product Specifications

Product Specifications
Brand	Mouldking
MPN / Set Number	12031
Minifigures	0
Number of pieces	3357
Packaging	Sealed Bags (No Box)
Year Manufactured	2024
Released	2024
Item Height	11.1 cm
Item Width	9.3 cm
Item Length	104.7 cm
Style / Theme	Trains
Age Level	18+
Product Name	Union Pacific UP844 Steam Locomotive