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LEGO Missing Piece Checker

Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

Knighton Hyper Cannon

Checking

30373 Knighton Hyper Cannon

43 pieces in 25 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.

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Piece checklist

Blue 12 pieces

  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Blue Part 61409 Element 4597338 ×6
  • Brick Sloped 30° 1 x 2 x 2/3 Blue Part 85984 Element 4651236 ×1
  • Hinge Brick 1 x 2 Base Blue Part 3937 Element 393723 ×1
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×1
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 1 spare in the box ×2
  • Turntable 2 x 2 Plate, Base Blue Part 3680 Element 368023 ×1

Dark Bluish Gray 9 pieces

  • Launcher Trigger, Weapon Gun Trigger Dark Bluish Gray Part 15392 Element 6051334 1 spare in the box ×2
  • Plate 2 x 3 Dark Bluish Gray Part 3021 Element 4211043 ×1
  • Plate 4 x 4 Corner Dark Bluish Gray Part 2639 Element 4539429 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End Dark Bluish Gray Part 63868 Element 6336990 or 4581225 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] Dark Bluish Gray Part 32000 Element 4210762 ×1

Black 7 pieces

  • Brick Sloped 45° 2 x 2 with Silver Control Panel and Screen Print Black Part 3039pr0018 Element 6083346 ×1
  • Launcher, Plate Special 1 x 2 with Mini Blaster Black Part 15403 Element 6102734 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×2

Light Bluish Gray 5 pieces

  • Brick Special 1 x 2 with Grille Light Bluish Gray Part 2877 Element 4211383 ×2
  • Hinge Brick 2 x 2 Top Plate Thin Light Bluish Gray Part 6134 Element 4211881 ×1
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Light Bluish Gray Part 99206 Element 4654577 ×1
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1

Trans-Neon Orange 5 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Neon Orange Part 6141 Element 6240218 or 3005747 1 spare in the box ×4
  • Windscreen 5 x 2 x 1 2/3 Trans-Neon Orange Part 6070 Element 6252517 or 6120916 ×1

Flat Silver 4 pieces

  • Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs Flat Silver Part 75937 Element 6020990 ×1
  • Technic Pin Connector Round [Slotted] Flat Silver Part 62462 Element 6245499 or 6054858 ×2
  • Weapon Sword / Greatsword Pointed with Thick Crossguard Flat Silver Part 18031 Element 6078442 ×1

Dark Blue 1 piece

  • Plate 1 x 4 Dark Blue Part 3710 Element 4502089 or 4177739 ×1

Minifigures 1 figure

  • Royal Soldier 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.

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