How many pieces are in the Combat Crawler X2?

Combat Crawler X2 contains 581 pieces.

When was the Combat Crawler X2 released?

Combat Crawler X2 was released in 2007.

🏛 Exo-Force

Set #7721

Combat Crawler X2

Combat Crawler X2 is a standout mech from the Exo-Force line.

Before you buy

Who it's for: Intermediate build Ideal for teens and adults who enjoy mechs and unique LEGO themes
Build: 581 pieces · about 4.5 hours Build time is an estimate.
Price: $49.99 list price · 8.6¢ per piece
Availability: Retired at LEGO

★★★☆☆ 3.8 community rating from 23 ratings

Fans appreciate the Combat Crawler X2 for its distinctive design and posability, though some find the color scheme somewhat dated. The Exo-Force theme resonates with many collectors, making this a sought-after set despite its age.

$49.99

Best Price

$44.99

You Save

10% OFF

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

Combat Crawler X2 is a standout mech from the Exo-Force line. Its unique design, blending organic and mechanical elements, makes it a visually striking model even today. The play features and posability add to its appeal, making it a fun build and display piece.

This set is perfect for Exo-Force enthusiasts and mech collectors. The build provides a good balance of complexity and enjoyment, with a satisfying final model that's fun to pose and display. It's also great for fans of unique color schemes and interesting part usage.

Skip this if you're not a fan of the Exo-Force theme or prefer more realistic builds. If you're looking for something more grounded, consider LEGO City or Creator Expert vehicles.

✨ New

Ask BlockTalk about this set

AI assistant with full set data

BlockTalk

Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Combat Crawler X2 - building tips, investment potential, comparisons, or anything else!

Try asking:

How does Combat Crawler X2 compare to other Exo-Force mechs in terms of design and playability? What are some creative ways to pose and display the Combat Crawler X2? How does the current market value of this set compare to its original MSRP? Is this set a good addition to a LEGO mech collection, and why?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

581

Pieces

⏱

4.5h

Estimated Build Time

📊

Intermediate

Difficulty

Build Highlights:

Intricate leg articulation for dynamic posing
Unique cockpit design with detailed interior
Incorporation of organic elements with mechanical structure
Sturdy construction for play and display

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

↑ Trending up since release

B+

Investment Grade

⏳ Retired

The Combat Crawler X2 is a retired set from a popular but niche theme, Exo-Force. Its age and increasing price trend suggest growing collector interest. The set's unique design and decent piece count contribute to its investment potential. However, the specialized theme means its appeal might be limited compared to more mainstream LEGO lines, so potential investors should be aware of the risks.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

📖 About This Set

Look out, EXO-FORCE -- here comes the special-edition Combat Crawler X2! This massive mechanical menace packs twice the danger and twice the firepower, because it's two mighty battle machines in one! In combined mode, it scales the cliffs of Sentai Mountain or the walls of the Golden City with its clawed legs, prison capture cage and powerful firing cannon, but when the battle gets tough, its front end detaches to fight as a raging robot battle machine of its own! It's up to Ryo and his missile-launching strike flyer to stop them both…if he can! Combat Crawler X2 has a prison transport and a missile that really fires! Detach the battle machine in front to send it to battle on its own! Includes Ryo minifigure with his strike flyer that really launches a missile! Includes special code to unlock extra content at www.EXO-FORCE.com.

⚖ Compare Similar Sets

Compared to other Exo-Force sets, the Combat Crawler X2 stands out with its unique leg design and overall aesthetic. While other sets may offer similar play features, the Combat Crawler X2's blend of organic and mechanical elements makes it a distinctive choice. Potential buyers might also consider other mech-themed sets from different LEGO themes, but the Combat Crawler X2 offers a unique Exo-Force experience.

3 Minifigures Included

Ryo in Gold Armor

4 parts

B+

Iron Drone / Devastator with Red Eyes

8 parts

Devastator with Trans-Red Torso and Red Eyes

8 parts

B+

The set includes a unique Ryo minifigure in gold armor, along with two Devastator drone minifigures with trans-red elements, adding to its collectible appeal.

📦 Parts Inventory

Official piece count: 581
Parts cataloged in this inventory: 136 unique parts, 561 pieces
Minifigures: 3

The official piece count includes the 20 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Tile Special 1 x ...

Part #: 2412b 2× Light Bluish Gray

Tile Special 1 x ...

Part #: 2412b 3× Black

Tile 1 x 4 with G...

Part #: 2431 1× Red

Plate Special 2 x...

Part #: 2444 7× Dark Bluish Gray

Plate Special 2 x...

Part #: 2444 1× Black

Plate 2 x 12

Part #: 2445 2× Dark Bluish Gray

Brick 2 x 6

Part #: 2456 2× Black

Brick Special 1 x...

Part #: 2458 8× Dark Bluish Gray

Plate Special 1 x...

Part #: 2540 4× Black

Plate Special 1 x...

Part #: 2540 3× Yellow

Technic Disc 3 x 3

Part #: 2723 2× Black

Technic Pin with ...

Part #: 2780 33× Black

Technic Beam 1 x ...

Part #: 2825 4× Black

Lever Small Base ...

Part #: 298c02 2× Yellow

Technic Brick 1 x...

Part #: 2991 4× Dark Bluish Gray

Brick 2 x 4

Part #: 3001 2× Black

Handlebars

Part #: 30031 1× Light Bluish Gray

Brick 1 x 2

Part #: 3004 3× Black

Brick 1 x 2

Part #: 3004 1× Dark Bluish Gray

Brick 1 x 1

Part #: 3005 4× Black

Fence Spindled 1 ...

Part #: 30055 3× Dark Bluish Gray

Brick 1 x 6

Part #: 3009 1× Light Bluish Gray

Plate 2 x 4

Part #: 3020 2× Light Bluish Gray

Plate 2 x 3

Part #: 3021 2× Red

Plate 2 x 2

Part #: 3022 4× Light Bluish Gray

Plate 2 x 2

Part #: 3022 2× Black

Plate 2 x 2

Part #: 3022 6× Dark Bluish Gray

Plate 2 x 2

Part #: 3022 1× Red

Plate 1 x 2

Part #: 3023 7× Yellow

Plate 1 x 2

Part #: 3023 2× Black

Plate 1 x 2

Part #: 3023 9× Light Bluish Gray

Plate 1 x 1

Part #: 3024 2× Trans-Red

Plate 4 x 4

Part #: 3031 1× Black

Plate 4 x 4

Part #: 3031 2× Dark Bluish Gray

Plate 2 x 8

Part #: 3034 4× Dark Bluish Gray

Plate 4 x 8

Part #: 3035 4× Black

Arm Mechanical wi...

Part #: 30377 1× Light Bluish Gray

Brick Sloped 45° ...

Part #: 3038 2× Black

Brick Sloped 45° ...

Part #: 3039 1× Yellow

Brick Sloped 45° ...

Part #: 3039 1× Dark Bluish Gray

Technic Link 1 x 5

Part #: 30397 4× Black

Hinge Plate 1 x 8...

Part #: 30407 2× Yellow

Brick Special 1 x...

Part #: 30414 2× Black

Brick Sloped 45° ...

Part #: 3048b 2× Black

Turntable 4 x 4 L...

Part #: 30516 1× Light Bluish Gray

Brick Special 1 x...

Part #: 30526 5× Light Bluish Gray

Brick Round 1 x 1...

Part #: 3062b 2× Light Bluish Gray

Turntable 4 x 4 T...

Part #: 30658 1× Black

Tile 2 x 2 with G...

Part #: 3068b 1× Black

Tile 2 x 2 with G...

Part #: 3068b 1× Dark Bluish Gray

Tile 1 x 2 with E...

Part #: 3069bpr0073 1× Yellow

Technic Brick 1 x...

Part #: 32000 1× Red

Technic Plate 2 x...

Part #: 32001 2× Yellow

Technic Beam 1 x ...

Part #: 32009 4× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32009 2× Dark Bluish Gray

Technic Axle and ...

Part #: 32013 16× Dark Bluish Gray

Technic Axle and ...

Part #: 32015 4× Black

Technic Brick 1 x...

Part #: 32018 6× Black

Technic Axle Conn...

Part #: 32039 1× Light Bluish Gray

Technic Axle Conn...

Part #: 32039 2× Black

Part #: 32064b 7× Dark Bluish Gray

Technic Brick 1 x...

Part #: 32064b 1× Yellow

Technic Brick 1 x...

Part #: 32064b 8× Black

Technic Bush 1/2 ...

Part #: 32123b 5× Light Bluish Gray

Technic Axle and ...

Part #: 32184 1× Black

Technic Driving R...

Part #: 32187 8× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32271 2× Red

Technic Axle and ...

Part #: 32291 1× Black

Technic Beam 1 x ...

Part #: 32316 6× Black

Technic Beam 1 x ...

Part #: 32348 1× Light Bluish Gray

Brick 1 x 2 x 2 w...

Part #: 3245b 2× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 32523 3× Yellow

Technic Beam 1 x ...

Part #: 32524 2× Black

Technic Beam 1 x ...

Part #: 32525 6× Light Bluish Gray

Technic Beam 3 x ...

Part #: 32526 2× Light Bluish Gray

Technic Pin Conne...

Part #: 32530 4× Dark Bluish Gray

Technic Brick 6 x...

Part #: 32532 2× Black

Large Figure Weap...

Part #: 32551 12× Light Bluish Gray

Brick Arch 1 x 6 ...

Part #: 3307 2× Black

Plate 1 x 8

Part #: 3460 2× Dark Bluish Gray

Brick 1 x 3

Part #: 3622 4× Light Bluish Gray

Plate 1 x 3

Part #: 3623 4× Red

Brick Sloped Inve...

Part #: 3660 1× Dark Bluish Gray

Brick Sloped Inve...

Part #: 3665 2× Dark Bluish Gray

Brick Sloped 75° ...

Part #: 3684 1× Black

Technic Brick 1 x...

Part #: 3700 8× Light Bluish Gray

Technic Brick 1 x...

Part #: 3701 2× Dark Bluish Gray

Technic Axle 4

Part #: 3705 5× Black

Technic Axle 6

Part #: 3706 1× Black

Technic Plate 2 x...

Part #: 3709 6× Black

Technic Plate 2 x...

Part #: 3709 8× Dark Bluish Gray

Plate 1 x 4

Part #: 3710 1× White

Plate 1 x 4

Part #: 3710 2× Black

Technic Bush

Part #: 3713 10× Red

Technic Axle 10

Part #: 3737 2× Black

Technic Plate 2 x...

Part #: 3738 2× Black

Technic Axle Pin ...

Part #: 3749 4× Tan

Plate 2 x 6

Part #: 3795 1× Light Bluish Gray

Plate 2 x 6

Part #: 3795 1× Dark Bluish Gray

Plate 2 x 10

Part #: 3832 2× Light Bluish Gray

Plate Special 1 x...

Part #: 3839b 2× Black

Technic Brick 1 x...

Part #: 3894 2× Black

Brick Round 2 x 2...

Part #: 3941 2× Yellow

Antenna 1 x 4 wit...

Part #: 3957a 2× Black

Plate 6 x 6

Part #: 3958 1× Dark Bluish Gray

Part #: 41747 1× White

Brick Wedged, Cur...

Part #: 41748 1× White

Technic Axle and ...

Part #: 42003 4× Dark Bluish Gray

Technic Pin 1/2 w...

Part #: 4274 2× Light Bluish Gray

Technic Axle Pin ...

Part #: 43093 9× Blue

Technic Rotation ...

Part #: 44224 2× Dark Bluish Gray

Technic Rotation ...

Part #: 44225 2× Light Bluish Gray

Brick Sloped 45° ...

Part #: 4445 2× Black

Hinge Plate 1 x 4...

Part #: 44568 4× Light Bluish Gray

Hinge Panel 2 x 4...

Part #: 44572 4× Black

Plate 1 x 10

Part #: 4477 2× Black

Technic Axle 3

Part #: 4519 4× Light Bluish Gray

Tool Hammer / Mal...

Part #: 4522 1× Black

Brick Wedged, Cur...

Part #: 45301 6× Black

Brick Round 1 x 1...

Part #: 4588 6× Dark Bluish Gray

Cone 1 x 1 [No To...

Part #: 4589 6× Trans-Neon Green

Plate Special 1 x...

Part #: 4590 1× Dark Bluish Gray

Tap 1 x 1 with Ho...

Part #: 4599a 4× Light Bluish Gray

Technic Rotation ...

Part #: 47455 4× Black

Brick Wedged, Cur...

Part #: 47753 6× Yellow

Technic Brick Spe...

Part #: 48169 2× Dark Bluish Gray

Technic Brick Spe...

Part #: 48171 4× Dark Bluish Gray

Technic Brick Spe...

Part #: 48172 1× Black

Plate Special 1 x...

Part #: 48336 1× Black

Crane Section 4 x...

Part #: 52041 1× Black

Animal Body Part,...

Part #: 53451 10× Red

Technic Axle and ...

Part #: 53586 1× Pearl Light Gray

Arm Mechanical wi...

Part #: 53989 6× Pearl Light Gray

Technic Axle 8 wi...

Part #: 55013 2× Black

Projectile, Techn...

Part #: 57028c01 3× Red

Large Figure Weap...

Part #: 57528 2× Red

Launcher, Technic...

Part #: 57796 2× Dark Bluish Gray

Technic Brick Spe...

Part #: 57908 1× Dark Bluish Gray

Technic Brick Spe...

Part #: 57909a 2× Dark Bluish Gray

Technic Axle 5.5 ...

Part #: 59426 2× Dark Bluish Gray

Plate Special 1 x...

Part #: 6019 2× Light Bluish Gray

Windscreen 5 x 2 ...

Part #: 6070 1× Black

Windscreen 5 x 2 ...

Part #: 6070 1× Trans-Brown

Wave / Flame Roun...

Part #: 6126a 2× Trans-Neon Orange

Plate Round 1 x 1...

Part #: 6141 2× Trans-Red

Technic Brick Spe...

Part #: 62712 4× Dark Bluish Gray

Technic Axle and ...

Part #: 6536 3× Black

Technic Axle Conn...

Part #: 6538b 2× Red

Technic Pin Long ...

Part #: 6558 46× Black

Technic Axle 3 wi...

Part #: 6587 8× Dark Bluish Gray

Hose, Ribbed 7mm ...

Part #: 78c11 2× Pearl Light Gray

🧱 Sticker Sheet for...

Part #: 60491 1× [No Color/Any Color]

The set offers a good selection of Technic parts in black and dark bluish gray, useful for MOC builders looking to create articulated models and mechanical structures.

🛒 Where to Buy

eBay

✓ In Stock

$44.99 →

Walmart

✓ In Stock

Compare on eBay →

$47.49

Target

✓ In Stock

Compare on eBay →

$49.99

💎 Notable Parts

Black Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots (46x) $2.30

Dark Bluish Gray Technic Axle and Pin Connector Angled #1 (16x) $1.60

Light Bluish Gray Large Figure Weapon, Claw Hook with Axle (12x) $3.00

Red Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small (10x) $2.50

Dark Bluish Gray Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] (7x) $1.75

Est. BrickLink Part Value

$11.15

💡 MOC Potential

🤖 Heavily armored battle mech

🚗 Futuristic all-terrain vehicle

🌳 Cybernetic creature or robotic animal

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 9 videos

3.0 /5

Mixed

0% positive

BlockTalk AI

Overall sentiment for the LEGO Exo-Force 7721 Combat Crawler X2 is mixed. While individual reviews exist, a clear consensus on the set's strengths and weaknesses is not readily apparent from the available data, but Samzilla33 rated the set 9/10.

Brick It - Lego Exo-Force 7721 Combat Crawler X2

CyberCychreus • 6.6K views Review

Lego Exo-Force Review - 7721 Combat Crawler X2

OneTrueBrick • 4.7K views Review

Lego EXO-FORCE Uplink 7708 UNBOXING, BUILD, and REVIEW! Retro Toys GARAGE GOLD

Super Channel G • 3.5K views Unboxing

Community Sentiment

Based on 9 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

What the Community Says

6 YouTube reviews

BlockTalk AI Summary

Reviews from channels like OneTrueBrick focus on presenting the set within the broader Exo-Force series context, providing wiki links and background music. Samzilla33 specifically calls out the Combat Crawler X2 as awesome.

Reddit Reviews

No Reddit reviews found

YouTube Reviews

6 videos

Brick It - Lego Exo-Force 7721 Combat Crawler X2

CyberCychreus

6.6K views Review

Lego Exo-Force Review - 7721 Combat Crawler X2

OneTrueBrick

4.7K views Review

Lego EXO-FORCE Uplink 7708 UNBOXING, BUILD, and REVIEW! Retro Toys GARAGE GOLD

Super Channel G

3.5K views Unboxing

Lego Exo-Force Review - 8104 Shadow Crawler

OneTrueBrick

3.0K views Review

View all 6 on YouTube

Community Content: These reviews are from Reddit and YouTube users sharing their personal experiences. Opinions may vary.

📖 Building Instructions 4

BUILD INSTR 3006, 7721 2/2 IN

Download PDF

BUILD INSTR 3006, 7721 2/2 NA

Download PDF

BUILD INSTR 3006, 7721 1/2 IN

Download PDF

BUILD INSTR 3006, 7721 1/2 NA

Download PDF

Inventory Statistics

136

Unique Parts

581

Official Piece Count

561

Cataloged Inventory Pieces

Minifigures

Spare Parts

The official piece count includes the 20 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 1

Missing a piece? Use the Missing Piece Checker.