The Workshop Sheet 10 of 19

LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

King's Catapult

Checking

1917 King's Catapult

18 pieces in 13 part and color combinations, plus 1 minifigure.

The official piece count includes the 4 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Show

Piece checklist

Black 8 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×1
  • Brick Arch 1 x 3 Black Part 4490 Element 4512727 or 4240242 ×1
  • Brick Special 1 x 2 with Pin Black Part 2458 Element 6116990 or 245826 ×1
  • Construction Vehicle Digger Bucket 2 x 3 Curved Bottom, Hollow, with Hinge 2 Fingers Black Part 4626 Element 462626 ×1
  • Hinge Plate 1 x 6 with 2 and 3 Fingers On Ends Black Part 4504 Element 4256462 or 4160816 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Black Part 4085c Element 408526 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×1

Light Gray 6 pieces

  • Brick 1 x 1 Light Gray Part 3005 Element 300502 ×2
  • Brick 1 x 2 Light Gray Part 3004 Element 300402 ×2
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×2

Green 2 pieces

  • Plate 2 x 8 Green Part 3034 Element 303428 ×2

Brown 1 piece

  • Weapon Halberd / Axe Brown Part 3848 Element 384825 ×1

Dark Gray 1 piece

  • Weapon Sword / Shortsword Dark Gray Part 3847 Element 4106926 or 384727 ×1

Minifigures 1 figure

  • Knight (Scale Mail on Red) - Black Arms, Black Legs, Black Neck-Protector Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.