Combat Crawler X2 (7721-1) is a Exo-Force LEGO set released in 2007 with 581 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Exo-Force sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 3 minifigures and 156 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
2007 (19 years ago — may be retired)
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Catalog scale
581 parts listed · 156 inventory lines tracked
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Minifigures
3 in this set's inventory — verify completeness when buying used
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Build manual
Digital booklet available on this page — use it to verify bag contents
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Build complexity
Large set — expect sticker sheets or multiple subassemblies; inspect photos closely
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Shipping weight (est.)
~1,092 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
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Building instructions
2 official booklets — read on BrickID
Book 1 of 2 Book 2 of 2
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Minifigures in Combat Crawler X2
Parts in this set
156 parts · page 1 of 4 · updating…
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Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small53451 · ×10 · Red -
Antenna 1 x 4 with Rounded Top3957a · ×2 · Black -
![Arm Mechanical with 2 Clips [Battle Droid]](https://cdn.rebrickable.com/media/parts/elements/4211658.jpg)
Arm Mechanical with 2 Clips [Battle Droid]30377 · ×1 · Light Bluish Gray -
![Arm Mechanical with Clip [Thin Support]](https://cdn.rebrickable.com/media/parts/elements/4494600.jpg)
Arm Mechanical with Clip [Thin Support]53989 · ×6 · Pearl Light Gray -
Brick 1 x 13005 · ×4 · Black -
Brick 1 x 23004 · ×1 · Dark Bluish Gray -
Brick 1 x 23004 · ×3 · Black -
Brick 1 x 2 x 2 with Inside Axle Holder3245b · ×2 · Dark Bluish Gray -
Brick 1 x 33622 · ×4 · Light Bluish Gray -
Brick 1 x 63009 · ×1 · Light Bluish Gray -
Brick 2 x 43001 · ×2 · Black -
Brick 2 x 62456 · ×2 · Black -
Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside3307 · ×2 · Black -
Brick Round 1 x 1 Open Stud3062b · ×2 · Light Bluish Gray -
Brick Round 1 x 1 with Fins, Open Stud4588 · ×6 · Dark Bluish Gray -
Brick Round 2 x 2 with Axle Hole3941 · ×2 · Yellow -
Brick Sloped 45° 2 x 1 Triple Smooth3048b · ×2 · Black -
Brick Sloped 45° 2 x 23039 · ×1 · Yellow -
Brick Sloped 45° 2 x 23039 · ×1 · Dark Bluish Gray -
Brick Sloped 45° 2 x 33038 · ×2 · Black -
Brick Sloped 45° 2 x 84445 · ×2 · Black -
![Brick Sloped 75° 2 x 2 x 3 [Hollow Studs]](https://cdn.rebrickable.com/media/parts/elements/4143982.jpg)
Brick Sloped 75° 2 x 2 x 3 [Hollow Studs]3684 · ×1 · Black -
Brick Sloped Inverted 45° 2 x 13665 · ×2 · Dark Bluish Gray -
![Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]](https://cdn.rebrickable.com/media/parts/elements/4211000.jpg)
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]3660 · ×1 · Dark Bluish Gray -
Brick Special 1 x 1 with Headlight4070 · ×2 · Red -
Brick Special 1 x 2 with 2 Pins, Round Pin Holes30526 · ×5 · Light Bluish Gray -
Brick Special 1 x 2 with Pin2458 · ×8 · Dark Bluish Gray -
Brick Special 1 x 4 with 4 Studs on One Side30414 · ×2 · Black -
Brick Wedged, Curved 16 x 4 Triple with Inner Ridges45301 · ×6 · Black -
Brick Wedged, Curved 4 x 4 No Top Studs47753 · ×6 · Yellow -
Brick Wedged, Curved 6 x 2 Left, Inner Ridges41748 · ×1 · White -
Brick Wedged, Curved 6 x 2 Right, Inner Ridges41747 · ×1 · White -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/618849.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×6 · Trans-Neon Green -
Crane Section 4 x 12 x 3 with 8 Pin Holes52041 · ×1 · Black -
![Fence Spindled 1 x 4 x 2 [2 Top Studs]](https://cdn.rebrickable.com/media/parts/elements/4256495.jpg)
Fence Spindled 1 x 4 x 2 [2 Top Studs]30055 · ×3 · Dark Bluish Gray -
Handlebars30031 · ×1 · Light Bluish Gray -
Hinge Panel 2 x 4 x 3 1/3 Locking Dual 2 Fingers44572 · ×4 · Black -
Hinge Plate 1 x 4 Locking Dual 1 Finger44568 · ×4 · Light Bluish Gray -
Hinge Plate 1 x 8 Locking with Angled Side Extensions, Rounded Plate Underside, 9 Teeth30407 · ×2 · Yellow -
Hose, Ribbed 7mm D. 11L / 8.8cm78c11 · ×2 · Pearl Light Gray -
Large Figure Weapon Claw Blade, Small57528 · ×2 · Red -
Large Figure Weapon, Claw Hook with Axle32551 · ×12 · Light Bluish Gray -
![Launcher, Technic Competition Cannon Flat Bottom [Complete Assembly]](https://cdn.rebrickable.com/media/parts/elements/4499435.jpg)
Launcher, Technic Competition Cannon Flat Bottom [Complete Assembly]57796 · ×2 · Dark Bluish Gray -
Lever Small Base with Black Lever298c02 · ×2 · Yellow -
Plate 1 x 13024 · ×2 · Trans-Red -
Plate 1 x 104477 · ×2 · Black -
Plate 1 x 23023 · ×7 · Yellow -
Plate 1 x 23023 · ×9 · Light Bluish Gray