Combat Crawler X2

Retired

Set number

7721-1

Theme

Exo-Force

Year

2007

Pieces

581

Minifigures

3 total (3 distinct designs)

Packaging

Box

Box size (L × W × H)

18.9 × 15.1 × 2.8 in (48 × 38.4 × 7.2 cm)

Retail price

• US $49.99
• UK £34.99

Release date

2007-09-01

Retired

2007-12-31

Shelf life

4 months

Instructions

Book 1 of 2 Book 2 of 2

All 4 instruction PDFs

Minifigures (3)

• 

  Devastator with Trans-Red Torso and Red Eyes

  fig-004841

  In 3 sets
• 

  Iron Drone / Devastator with Red Eyes

  fig-004835

  In 4 sets
• 

  Ryo in Gold Armor

  fig-000993

  In 5 sets

Qty	Image	Part	Name	Color	Sets
2		3957a	Antenna 1 x 4 with Rounded Top	Black	In 281 sets
4		3005	Brick 1 x 1	Black	In 1,243 sets
3		3004	Brick 1 x 2	Black	In 1,820 sets
2		3001	Brick 2 x 4	Black	In 1,114 sets
2		2456	Brick 2 x 6	Black	In 359 sets
2		3307	Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside	Black	In 25 sets
2		3048b	Brick Sloped 45° 2 x 1 Triple Smooth	Black	In 5 sets
2		3038	Brick Sloped 45° 2 x 3	Black	In 130 sets
2		4445	Brick Sloped 45° 2 x 8	Black	In 55 sets
1		3684	Brick Sloped 75° 2 x 2 x 3 [Hollow Studs]	Black	In 63 sets
2		30414	Brick Special 1 x 4 with 4 Studs on One Side	Black	In 376 sets
6		45301	Brick Wedged, Curved 16 x 4 Triple with Inner Ridges	Black	In 25 sets
1		52041	Crane Section 4 x 12 x 3 with 8 Pin Holes	Black	Exclusive
4		44572	Hinge Panel 2 x 4 x 3 1/3 Locking Dual 2 Fingers	Black	In 2 sets
2		4477	Plate 1 x 10	Black	In 645 sets
2		3023	Plate 1 x 2	Black	In 2,911 sets
2		3710	Plate 1 x 4	Black	In 2,176 sets
2		3022	Plate 2 x 2	Black	In 2,338 sets
1		3031	Plate 4 x 4	Black	In 836 sets
4		3035	Plate 4 x 8	Black	In 528 sets
1		48336	Plate Special 1 x 2 [Side Handle Closed Ends]	Black	In 731 sets
4		2540	Plate Special 1 x 2 Side Handle [Free Ends]	Black	In 707 sets
2		3839b	Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment]	Black	In 303 sets
1		2444	Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]	Black	In 162 sets
2		3737	Technic Axle 10	Black	In 689 sets
5		3705	Technic Axle 4	Black	In 1,691 sets
1		3706	Technic Axle 6	Black	In 1,274 sets
2		55013	Technic Axle 8 with Stop	Black	In 6 sets
4		32015	Technic Axle and Pin Connector Angled #5 - 112.5°	Black	In 236 sets
3		6536	Technic Axle and Pin Connector Perpendicular	Black	In 451 sets
1		32184	Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	Black	In 325 sets
1		32291	Technic Axle and Pin Connector Perpendicular Double	Black	In 211 sets
2		32039	Technic Axle Connector with Axle Hole	Black	In 409 sets
4		2825	Technic Beam 1 x 4 Thin with Stud Connector	Black	In 166 sets
6		32316	Technic Beam 1 x 5 Thick	Black	In 412 sets
2		32524	Technic Beam 1 x 7 Thick	Black	In 333 sets
6		32018	Technic Brick 1 x 14 [13 Pin Holes]	Black	In 185 sets
8		32064b	Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]	Black	In 103 sets
2		3894	Technic Brick 1 x 6 [5 Pin Holes]	Black	In 342 sets
2		32532	Technic Brick 6 x 8 with 4 x 6 Opening	Black	In 113 sets
1		48172	Technic Brick Special 2 x 2 with Pin Hole, with 2 Rotation Joint Sockets	Black	In 113 sets
2		2723	Technic Disc 3 x 3	Black	In 187 sets
4		30397	Technic Link 1 x 5	Black	In 11 sets
46		6558	Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots	Black	In 403 sets
33		2780	Technic Pin with Friction Ridges Lengthwise and Center Slots	Black	In 2,480 sets
6		3709	Technic Plate 2 x 4 [3 Holes]	Black	In 329 sets
2		3738	Technic Plate 2 x 8 [7 Holes]	Black	In 196 sets
4		47455	Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction	Black	In 212 sets
1		3068b	Tile 2 x 2 with Groove	Black	In 1,005 sets
3		2412b	Tile Special 1 x 2 Grille with Bottom Groove	Black	In 1,138 sets
1		4522	Tool Hammer / Mallet Large	Black	In 321 sets
1		30658	Turntable 4 x 4 Top, Locking	Black	In 12 sets
1		6070	Windscreen 5 x 2 x 1 2/3	Black	In 12 sets
9		43093	Technic Axle Pin with Friction Ridges Lengthwise	Blue	In 2,438 sets
1		3004	Brick 1 x 2	Dark Bluish Gray	In 690 sets
2		3245b	Brick 1 x 2 x 2 with Inside Axle Holder	Dark Bluish Gray	In 27 sets
6		4588	Brick Round 1 x 1 with Fins, Open Stud	Dark Bluish Gray	In 110 sets
1		3039	Brick Sloped 45° 2 x 2	Dark Bluish Gray	In 453 sets
2		3665	Brick Sloped Inverted 45° 2 x 1	Dark Bluish Gray	In 379 sets
1		3660	Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]	Dark Bluish Gray	In 438 sets
8		2458	Brick Special 1 x 2 with Pin	Dark Bluish Gray	In 120 sets
3		30055	Fence Spindled 1 x 4 x 2 [2 Top Studs]	Dark Bluish Gray	In 12 sets
2		57796	Launcher, Technic Competition Cannon Flat Bottom [Complete Assembly]	Dark Bluish Gray	In 45 sets
2		3460	Plate 1 x 8	Dark Bluish Gray	In 599 sets
2		2445	Plate 2 x 12	Dark Bluish Gray	In 329 sets
6		3022	Plate 2 x 2	Dark Bluish Gray	In 1,242 sets
1		3795	Plate 2 x 6	Dark Bluish Gray	In 1,089 sets
4		3034	Plate 2 x 8	Dark Bluish Gray	In 681 sets
2		3031	Plate 4 x 4	Dark Bluish Gray	In 564 sets
1		3958	Plate 6 x 6	Dark Bluish Gray	In 277 sets
1		4590	Plate Special 1 x 4 Offset with Bar Holes	Dark Bluish Gray	In 180 sets
7		2444	Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]	Dark Bluish Gray	In 60 sets
8		6587	Technic Axle 3 with Stud	Dark Bluish Gray	In 257 sets
2		59426	Technic Axle 5.5 with Stop [Rounded Short End]	Dark Bluish Gray	In 617 sets
16		32013	Technic Axle and Pin Connector Angled #1	Dark Bluish Gray	In 239 sets
4		42003	Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	Dark Bluish Gray	In 201 sets
2		32009	Technic Beam 1 x 11.5 Double Bent Thick	Dark Bluish Gray	In 76 sets
4		2991	Technic Brick 1 x 2 - 1 x 2 Angled with Bumper Holder [Closed Front]	Dark Bluish Gray	In 3 sets
7		32064b	Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]	Dark Bluish Gray	In 106 sets
2		3701	Technic Brick 1 x 4 [3 Pin Holes]	Dark Bluish Gray	In 314 sets
1		57908	Technic Brick Special 2 x 2 with 10.2mm Balls [Center Mold Indention]	Dark Bluish Gray	In 26 sets
4		62712	Technic Brick Special 2 x 2 with Ball Socket Reinforced and Axle Hole	Dark Bluish Gray	In 17 sets
4		48171	Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side]	Dark Bluish Gray	In 125 sets
2		48169	Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Socket	Dark Bluish Gray	In 148 sets
2		57909a	Technic Brick Special 2 x 2 with Solid Ball and Axle Hole	Dark Bluish Gray	In 49 sets
4		32530	Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top]	Dark Bluish Gray	In 275 sets
8		3709	Technic Plate 2 x 4 [3 Holes]	Dark Bluish Gray	In 207 sets
2		44224	Technic Rotation Joint Disk with Pin Hole and 3L Beam Thick	Dark Bluish Gray	In 70 sets
1		3068b	Tile 2 x 2 with Groove	Dark Bluish Gray	In 549 sets
1		30377	Arm Mechanical with 2 Clips [Battle Droid]	Light Bluish Gray	In 125 sets
4		3622	Brick 1 x 3	Light Bluish Gray	In 515 sets
1		3009	Brick 1 x 6	Light Bluish Gray	In 487 sets
2		3062b	Brick Round 1 x 1 Open Stud	Light Bluish Gray	In 516 sets
5		30526	Brick Special 1 x 2 with 2 Pins, Round Pin Holes	Light Bluish Gray	In 78 sets
1		30031	Handlebars	Light Bluish Gray	In 134 sets
4		44568	Hinge Plate 1 x 4 Locking Dual 1 Finger	Light Bluish Gray	In 205 sets
12		32551	Large Figure Weapon, Claw Hook with Axle	Light Bluish Gray	In 4 sets
9		3023	Plate 1 x 2	Light Bluish Gray	In 1,772 sets
2		3832	Plate 2 x 10	Light Bluish Gray	In 444 sets
4		3022	Plate 2 x 2	Light Bluish Gray	In 1,371 sets
2		3020	Plate 2 x 4	Light Bluish Gray	In 1,452 sets
1		3795	Plate 2 x 6	Light Bluish Gray	In 989 sets
2		6019	Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]	Light Bluish Gray	In 74 sets
4		4599a	Tap 1 x 1 with Hole in Spout	Light Bluish Gray	In 65 sets
4		4519	Technic Axle 3	Light Bluish Gray	In 1,466 sets
1		32039	Technic Axle Connector with Axle Hole	Light Bluish Gray	In 192 sets
4		32009	Technic Beam 1 x 11.5 Double Bent Thick	Light Bluish Gray	In 51 sets
6		32525	Technic Beam 1 x 11 Thick	Light Bluish Gray	In 130 sets
1		32348	Technic Beam 1 x 7 Bent (4 - 4) Thick	Light Bluish Gray	In 53 sets
2		32526	Technic Beam 3 x 5 L-Shape Thick	Light Bluish Gray	In 149 sets
8		3700	Technic Brick 1 x 2 [1 Pin Hole]	Light Bluish Gray	In 564 sets
5		32123b	Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	Light Bluish Gray	In 1,038 sets
8		32187	Technic Driving Ring Extension, 4 Ridges	Light Bluish Gray	In 86 sets
2		4274	Technic Pin 1/2 without Friction Ridges	Light Bluish Gray	In 1,245 sets
2		44225	Technic Rotation Joint Disk with Pin and 3L Beam Thick	Light Bluish Gray	In 73 sets
2		2412b	Tile Special 1 x 2 Grille with Bottom Groove	Light Bluish Gray	In 878 sets
1		30516	Turntable 4 x 4 Locking Grooved Base	Light Bluish Gray	In 8 sets
1		60491	Sticker Sheet for Set 7721-1	[No Color/Any Color]	Exclusive
6		53989	Arm Mechanical with Clip [Thin Support]	Pearl Light Gray	In 18 sets
2		78c11	Hose, Ribbed 7mm D. 11L / 8.8cm	Pearl Light Gray	In 18 sets
1		53586	Technic Axle and Pin Connector, Perpendicular with Extension	Pearl Light Gray	In 36 sets
10		53451	Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small	Red	In 92 sets
2		4070	Brick Special 1 x 1 with Headlight	Red	In 408 sets
2		57528	Large Figure Weapon Claw Blade, Small	Red	In 2 sets
4		3623	Plate 1 x 3	Red	In 698 sets
1		3022	Plate 2 x 2	Red	In 1,469 sets
2		3021	Plate 2 x 3	Red	In 1,031 sets
1		4032a	Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	Red	In 535 sets
3		57028c01	Projectile, Technic Competition Arrow, Liftarm Shaft with Hollow Black Rubber End	Red	In 6 sets
8		32062	Technic Axle 2 Notched	Red	In 2,234 sets
2		6538b	Technic Axle Connector Ridged [with x Hole x Orientation]	Red	In 28 sets
2		32271	Technic Beam 1 x 9 Bent (7 - 3) Thick	Red	In 30 sets
1		32000	Technic Brick 1 x 2 [2 Pin Holes]	Red	In 122 sets
10		3713	Technic Bush	Red	In 634 sets
6		32054	Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	Red	In 264 sets
1		2431	Tile 1 x 4 with Groove	Red	In 528 sets
4		3749	Technic Axle Pin without Friction Ridges Lengthwise	Tan	In 1,436 sets
1		6070	Windscreen 5 x 2 x 1 2/3	Trans-Brown	In 29 sets
6		4589	Cone 1 x 1 [No Top Groove]	Trans-Neon Green	In 143 sets
2		6126a	Wave / Flame Rounded with Base Pegs	Trans-Neon Orange	In 237 sets
2		3024	Plate 1 x 1	Trans-Red	In 642 sets
2		6141	Plate Round 1 x 1 with Solid Stud	Trans-Red	In 1,626 sets
1		41748	Brick Wedged, Curved 6 x 2 Left, Inner Ridges	White	In 93 sets
1		41747	Brick Wedged, Curved 6 x 2 Right, Inner Ridges	White	In 82 sets
1		3710	Plate 1 x 4	White	In 1,874 sets
2		3941	Brick Round 2 x 2 with Axle Hole	Yellow	In 284 sets
1		3039	Brick Sloped 45° 2 x 2	Yellow	In 332 sets
6		47753	Brick Wedged, Curved 4 x 4 No Top Studs	Yellow	In 4 sets
2		30407	Hinge Plate 1 x 8 Locking with Angled Side Extensions, Rounded Plate Underside, 9 Teeth	Yellow	In 5 sets
2		298c02	Lever Small Base with Black Lever	Yellow	In 204 sets
7		3023	Plate 1 x 2	Yellow	In 1,380 sets
3		2540	Plate Special 1 x 2 Side Handle [Free Ends]	Yellow	In 118 sets
3		32523	Technic Beam 1 x 3 Thick	Yellow	In 140 sets
1		32064b	Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]	Yellow	In 35 sets
2		32001	Technic Plate 2 x 6 [5 Holes]	Yellow	In 17 sets
1		3069bpr0073	Tile 1 x 2 with Engraved Code for Exo-Force	Yellow	In 7 sets
5		2780	Technic Pin with Friction Ridges Lengthwise and Center Slots	Black	In 2,480 sets	extra
1		30377	Arm Mechanical with 2 Clips [Battle Droid]	Light Bluish Gray	In 125 sets	extra
2		32123b	Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	Light Bluish Gray	In 1,038 sets	extra
1		4274	Technic Pin 1/2 without Friction Ridges	Light Bluish Gray	In 1,245 sets	extra
2		53451	Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small	Red	In 92 sets	extra
3		3713	Technic Bush	Red	In 634 sets	extra
1		6141	Plate Round 1 x 1 with Solid Stud	Trans-Red	In 1,626 sets	extra
1		298c02	Lever Small Base with Black Lever	Yellow	In 204 sets	extra

Building instructions

• BUILD INSTR 3006, 7721 2/2 IN
• BUILD INSTR 3006, 7721 2/2 NA
• BUILD INSTR 3006, 7721 1/2 IN
• BUILD INSTR 3006, 7721 1/2 NA

PDFs from LEGO.com. The same booklet is often printed in several versions (e.g. V29 EU A4 format, V39 US Letter format).