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Arin's Battle Mech

Snapshot

vs RRP
16% under
Per piece
8.4¢

Value per piece

cost per part at each reference

8.4¢lowest market value

about 45% under retail, which runs ~15¢ a piece

Reference

MSRP15¢
Used market8.4¢
New market13¢
Set Retired

Arin's Battle Mech

Reference
71804-1
Theme
Ninjago
Year
2024
Parts
104
UPC
673419387132
EAN
5702017565545

Arin's Battle Mech is a LEGO set from the LEGO Ninjago theme released in 2024. It is built from 104 pieces.

New avg$13.44Used avg$8.74MSRP$15.99

Avg. 3rd-party market prices via BrickPicker, not CollectORbuild seller prices

See full valuation & price history →Track its value free →
Value historytracking since Jul 24, 2026

Currently $13.44 new. We just started tracking this set’s value. The chart fills in as prices are re-checked over the coming weeks.

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Parts in this set (74)

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A peek at the pile. See the full list, grouped by color, on the parts page.

Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section1×Creature Body Part, Barb Large (Claw, Talon) with Clip2×Bar 1 x 4 x 2 with Studs1×Brick Curved 2 x 2 with Lip, No Studs2×Brick Curved, 3 x 1 with 1/3 Inverted Cutout2×Brick Sloped Inverted 45° 6 x 1 Double with 1 x 4 Recessed1×Brick Special 1 x 1 with Studs on 2 Sides1×Wedge Plate 2 x 41×Wedge Plate 4 Stud 45° Angle Plate2×Wedge Plate 4 x 6 Cut Corners1×Plate Round Corners 2 x 6 Double1×Plate Special 1 x 2 with Clips Horizontal [Open O Clips]5×Plate Special 1 x 2 with Handle on End [Closed Ends]2×Plate Special 2 x 2 with Only 2 studs1×View all 74 →