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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.

Imperial AT-ST

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10174 Imperial AT-ST

1,069 pieces in 164 part and color combinations.

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

Light Bluish Gray 452 pieces

  • Bar 1 x 12 with 1 x 2 Plate End with Solid Studs and 1 x 1 Round Plate End Light Bluish Gray Part 42445 Element 6277023 or 4211759 ×2
  • Bar 4L (Lightsaber Blade / Wand) Light Bluish Gray Part 30374 Element 6116608 or 4211628 ×2
  • Bar 6.6L with Stop Ring [Umbrella Stand] Light Bluish Gray Part 4095 Element 4533908 or 4211887 ×5
  • Brick 1 x 10 Light Bluish Gray Part 6111 Element 4211521 ×2
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×7
  • Brick 1 x 2 x 2 with Inside Axle Holder Light Bluish Gray Part 3245b ×2
  • Brick 1 x 4 Light Bluish Gray Part 3010 Element 4211394 ×7
  • Brick 1 x 6 Light Bluish Gray Part 3009 Element 4211393 ×1
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Light Bluish Gray Part 47457 Element 4494475 ×7
  • Brick Curved 2 x 3 Light Bluish Gray Part 6215 Element 4217918 ×2
  • Brick Round 2 x 2 with Axle Hole Light Bluish Gray Part 3941 Element 4211526 ×2
  • Brick Sloped 33° 3 x 1 Light Bluish Gray Part 4286 Element 4211488 ×4
  • Brick Sloped 33° 3 x 3 Double Convex Light Bluish Gray Part 3675 Element 6434363 or 4186667 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Bluish Gray Part 3040b Element 4211614 ×4
  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Light Bluish Gray Part 4287b ×6
  • Brick Sloped Inverted 45° 2 x 1 Light Bluish Gray Part 3665 Element 4211437 ×8
  • Brick Special 1 x 1 Studs on 4 Sides Light Bluish Gray Part 4733 Element 4211511 ×1
  • Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End Light Bluish Gray Part 47456 Element 6503196 or 6021783 ×4
  • Brick Wedged, Curved 8 x 3 x 2 Open Left Light Bluish Gray Part 41750 Element 6558994 or 4587577 ×2
  • Brick Wedged, Curved 8 x 3 x 2 Open Right Light Bluish Gray Part 41749 Element 6558992 or 4587575 ×2
  • Dish 4 x 4 Inverted [Radar] Light Bluish Gray Part 3960 Element 4211664 ×2
  • Dish 6 x 6 Inverted (Radar) with Hollow Studs Light Bluish Gray Part 44375a ×4
  • Hinge Brick 2 x 2 Top Plate Thin Light Bluish Gray Part 6134 Element 4211881 ×17
  • Hinge Plate 1 x 2 Locking with 1 Finger On End, with Groove Light Bluish Gray Part 44301a Element 4211803 2 spares in the box ×11
  • Panel 1 x 1 x 1 Corner Light Bluish Gray Part 6231 Element 4215513 ×8
  • Panel 1 x 2 x 1 [Square Corners] Light Bluish Gray Part 4865a Element 4211515 ×8
  • Panel 1 x 2 x 2 [Hollow Studs] Light Bluish Gray Part 4864b Element 4211576 ×2
  • Panel 1 x 2 x 3 [Hollow Studs] Light Bluish Gray Part 2362b Element 4211577 ×2
  • Panel 1 x 4 x 1 with Rounded Corners [Thick Wall] Light Bluish Gray Part 43337 Element 4211769 ×2
  • Plate 1 x 10 Light Bluish Gray Part 4477 Element 4251149 or 4211495 ×3
  • Plate 1 x 3 Light Bluish Gray Part 3623 Element 4211429 or 3623194 ×20
  • Plate 1 x 6 Light Bluish Gray Part 3666 Element 4211438 ×10
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×6
  • Plate 2 x 10 Light Bluish Gray Part 3832 Element 4211462 ×3
  • Plate 2 x 2 Corner Light Bluish Gray Part 2420 Element 4211353 ×12
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×27
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×15
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×10
  • Plate 4 x 12 Light Bluish Gray Part 3029 Element 4211401 ×2
  • Plate 4 x 4 Light Bluish Gray Part 3031 Element 4243797 or 4211403 ×4
  • Plate 4 x 6 Light Bluish Gray Part 3032 Element 4211404 ×13
  • Plate 4 x 8 Light Bluish Gray Part 3035 Element 4211407 ×2
  • Plate 6 x 6 Light Bluish Gray Part 3958 Element 4211474 ×2
  • Plate 6 x 8 Light Bluish Gray Part 3036 Element 4211408 ×10
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×10
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Bluish Gray Part 3794a ×2
  • Plate Special 2 x 2 with 2 Pin Holes Light Bluish Gray Part 2817 Element 4211376 ×4
  • Tap 1 x 1 with Hole in Spout Light Bluish Gray Part 4599a ×15
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×3
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×6
  • Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×2
  • Technic Beam 1 x 13 Thick Light Bluish Gray Part 41239 Element 4522934 or 4156299 ×4
  • Technic Beam 1 x 2 Thin Light Bluish Gray Part 41677 Element 6348143 or 4211741 ×2
  • Technic Beam 1 x 6 Thin Light Bluish Gray Part 32063 Element 6170293 or 4211586 ×2
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Light Bluish Gray Part 6629 Element 6279885 or 4255613 ×2
  • Technic Brick 1 x 10 [9 Pin Holes] Light Bluish Gray Part 2730 Element 4211374 ×12
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Light Bluish Gray Part 32064b ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Light Bluish Gray Part 3702 Element 4211442 ×7
  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×7
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×6
  • Technic Gear 20 Tooth Bevel Light Bluish Gray Part 32198 Element 6359714 or 6031956 ×1
  • Technic Pin Connector Round [No Slot] Light Bluish Gray Part 75535 Element 4212355 ×3
  • Technic Plate 2 x 8 [7 Holes] Light Bluish Gray Part 3738 Element 4211449 ×6
  • Technic Rotation Joint Disk with Pin and 3L Beam Thick Light Bluish Gray Part 44225 Element 6671155 or 6332151 ×4
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×6
  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×8
  • Tile 2 x 2 with Groove Light Bluish Gray Part 3068b Element 4211413 ×14
  • Tile Special 1 x 1 with Clip and Straight Tips Light Bluish Gray Part 2555 Element 4211369 or 2555194 ×6
  • Turntable 4 x 4 Locking Grooved Base Light Bluish Gray Part 30516 Element 4296249 ×1
  • Wedge Plate 12 x 3 Left Light Bluish Gray Part 47397 Element 4208988 ×5
  • Wedge Plate 12 x 3 Right Light Bluish Gray Part 47398 Element 4209006 ×5
  • Wedge Plate 3 x 2 Left Light Bluish Gray Part 43723 Element 4211794 ×1
  • Wedge Plate 3 x 2 Right Light Bluish Gray Part 43722 Element 4211791 ×1
  • Wedge Plate 3 x 3 Cut Corner Light Bluish Gray Part 2450 Element 4211361 ×6
  • Wedge Plate 4 x 2 Left Light Bluish Gray Part 41770 Element 4211735 ×7
  • Wedge Plate 4 x 2 Right Light Bluish Gray Part 41769 Element 4211732 ×7
  • Wedge Plate 6 x 3 Left Light Bluish Gray Part 54384 Element 4282789 ×7
  • Wedge Plate 6 x 3 Right Light Bluish Gray Part 54383 Element 4282786 ×7

Dark Bluish Gray 356 pieces

  • Bar 1 x 3 (Radio Handle, Phone Handset) Dark Bluish Gray Part 6190 Element 4210676 ×6
  • Bar 1 x 8 with Brick 1 x 2 Curved Top End (Axle Holder Inside Small End) Dark Bluish Gray Part 30359b Element 6273322 or 4210815 ×4
  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×4
  • Brick 1 x 3 Dark Bluish Gray Part 3622 Element 4211104 ×4
  • Brick Arch 1 x 3 x 2 Curved Top Dark Bluish Gray Part 6005 Element 4618881 or 4586564 ×4
  • Brick Curved 2 x 2, Two Top Studs Dark Bluish Gray Part 30165 Element 4211093 ×6
  • Brick Curved 6 x 1 Dark Bluish Gray Part 42022 Element 6058858 or 4210778 ×14
  • Brick Round 1 x 1 Open Stud Dark Bluish Gray Part 3062b Element 4211090 ×13
  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder Dark Bluish Gray Part 30367b ×2
  • Brick Sloped 18° 4 x 2 Dark Bluish Gray Part 30363 Element 4210637 ×3
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 ×2
  • Brick Sloped 33° 3 x 1 Dark Bluish Gray Part 4286 Element 4211045 ×8
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×6
  • Brick Sloped 45° 2 x 4 Dark Bluish Gray Part 3037 Element 4211127 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Dark Bluish Gray Part 3747b Element 4211064 ×5
  • Brick Sloped Inverted 45° 2 x 1 Dark Bluish Gray Part 3665 Element 4211096 ×14
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Dark Bluish Gray Part 3660 Element 4211000 ×6
  • Brick Special 1 x 1 with Studs on 2 Sides Dark Bluish Gray Part 47905 Element 4213574 ×8
  • Brick Special 1 x 4 with 4 Studs on One Side Dark Bluish Gray Part 30414 Element 4210725 ×3
  • Brick Wedged, Curved 6 x 2 Left, Inner Ridges Dark Bluish Gray Part 41748 Element 6063681 or 4210772 ×2
  • Brick Wedged, Curved 6 x 2 Right, Inner Ridges Dark Bluish Gray Part 41747 Element 6063685 or 4210771 ×2
  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs Dark Bluish Gray Part 45677 Element 4210940 ×5
  • Brick Wedged, Sloped 4 x 2 Triple Left Dark Bluish Gray Part 43710 Element 4210866 ×1
  • Brick Wedged, Sloped 4 x 2 Triple Right Dark Bluish Gray Part 43711 Element 4210867 ×1
  • Brick Wedged, Sloped 45° 4 x 2 Left Dark Bluish Gray Part 43721 Element 4298580 or 4210870 ×2
  • Brick Wedged, Sloped 45° 4 x 2 Right Dark Bluish Gray Part 43720 Element 4298583 or 4210871 ×2
  • Cone 1 x 1 [No Top Groove] Dark Bluish Gray Part 4589 Element 4518486 or 4210647 ×9
  • Dish 2 x 2 Inverted [Radar] Dark Bluish Gray Part 4740 Element 4211010 ×16
  • Dish 8 x 8 Inverted [Radar], Solid Studs, Rounded Anti-stud Underside Dark Bluish Gray Part 3961 Element 4268409 ×3
  • Equipment Binoculars Dark Bluish Gray Part 30162 Element 4587887 or 4211051 ×4
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Dark Bluish Gray Part 4349 Element 4210698 ×2
  • Hinge Brick 1 x 2 Locking with 2 Fingers Vertical End, 9 Teeth Dark Bluish Gray Part 30365 Element 4210724 ×6
  • Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Dark Bluish Gray Part 30553 Element 4210695 ×11
  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove Dark Bluish Gray Part 44567a Element 4210892 ×8
  • Jet Engine Fan with 10 Blades and Technic Pin Dark Bluish Gray Part 46667 Element 6313484 or 6100596 ×2
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×39
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×22
  • Plate 2 x 12 Dark Bluish Gray Part 2445 Element 4211067 ×6
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×11
  • Plate 2 x 8 Dark Bluish Gray Part 3034 Element 4210997 ×2
  • Plate 4 x 10 Dark Bluish Gray Part 3030 Element 4211122 ×1
  • Plate Special 1 x 2 Side Handle [Free Ends] Dark Bluish Gray Part 2540 Element 4210660 ×2
  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×5
  • Technic Axle and Pin Connector Angled #1 Dark Bluish Gray Part 32013 Element 32013199 or 6296856 ×2
  • Technic Beam 1 x 3 Thin Dark Bluish Gray Part 6632 Element 6632199 or 6364452 ×4
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Dark Bluish Gray Part 32271 Element 6276837 or 4281516 ×6
  • Technic Brick 1 x 12 [11 Pin Holes] Dark Bluish Gray Part 3895 Element 4210963 ×6
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×1
  • Technic Brick 1 x 6 [5 Pin Holes] Dark Bluish Gray Part 3894 Element 4210917 or 3894199 ×4
  • Technic Rotation Joint Disk with Pin Hole and 3L Beam Thick Dark Bluish Gray Part 44224 Element 4182751 ×4
  • Tile 1 x 4 with Groove Dark Bluish Gray Part 2431 Element 4211053 ×6
  • Tile 1 x 6 with Groove Dark Bluish Gray Part 6636 Element 4210651 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×20
  • Wedge Plate 3 x 2 Left Dark Bluish Gray Part 43723 Element 4210872 ×9
  • Wedge Plate 3 x 2 Right Dark Bluish Gray Part 43722 Element 4210869 ×10
  • Wedge Plate 3 x 6 Cut Corners Dark Bluish Gray Part 2419 Element 4210984 ×2

Black 182 pieces

  • Brick 2 x 2 Corner Black Part 2357 Element 235776 or 235726 ×2
  • Brick Curved 1 x 4 x 1 1/3 No Studs, Lowered Inside Support Black Part 6191 Element 4200031 ×4
  • Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Black Part 6222 Element 6533083 or 4290056 ×1
  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×4
  • Flexible Hose 8.5L with Tabbed Ends (Ends same color as Tube) Black Part 73590c02a Element 4540890 or 621130 ×3
  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×17
  • Plate 1 x 6 Black Part 3666 Element 366626 ×2
  • Plate 4 x 12 Black Part 3029 Element 302926 ×2
  • Plate 4 x 6 Black Part 3032 Element 303226 ×1
  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 2 spares in the box ×20
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Black Part 4085c Element 408526 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×2
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×5
  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×5
  • Technic Axle and Pin Connector Angled #6 - 90° Black Part 32014 Element 6268905 or 4107767 ×4
  • Technic Brick 4 x 4 with 2 x 2 Opening Black Part 32324 Element 6222427 or 4226981 ×2
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×26
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 3 spares in the box ×55
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×8
  • Technic Plate 2 x 6 [5 Holes] Black Part 32001 Element 3200126 ×1
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×12
  • Turntable 4 x 4 Top, Locking Black Part 30658 Element 4142915 ×1

Blue 56 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×14
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 3 spares in the box ×41
  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×1

Tan 18 pieces

  • Technic Brick 1 x 4 [3 Pin Holes] Tan Part 3701 Element 4234365 or 370105 ×18

Red 4 pieces

  • Brick Sloped 33° 3 x 2 Red Part 3298 Element 329821 ×4

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 10174-1 [No Color/Any Color] Part 56143 Element 4293490 ×1

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

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