Skip to content

Back of the Box Builds

LEGO Alternate Builds!

SETS
- Adventurers
- Aquazone
- Belville
- BATMAN™
- BIONICLE
- Building Set with People
- Castle
- Duplo
- Fabuland
- Harry Potter
- Holiday and Event
- LEGOLAND
- Model Team
- Pirates
- Space
- Star Wars
- Technic
- Train
- Town
- Universal Building Set
- Western
- More Sets
- Misc
USEFUL LINKS
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Bonus/Value Pack Alternate Builds Castle Castle Alternate Builds Instructions Added Official Sets Royal Knights Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds

1843 – Side L

January 22, 2021March 14, 2025 Master Builder 6142 Views

From: 1843: Space / Castle Value Pack
Name: Space / Castle Secret Armory ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF, and .io file submitted on January 29, 2021 by: Mr.AstonishedRaccoon

← 1843: Space/Castle Value Pack
1843 – Side R →

You May Also Like

6953 – Back D

May 16, 2023May 17, 2023 Master Builder

6892 – Back A

November 17, 2021June 1, 2023 Master Builder

6075-1: Wolfpack Tower

October 11, 2021March 11, 2024 Master Builder

6813: Galactic Chief

April 8, 2020July 29, 2023 Master Builder

1988 Classic Space and Blacktron with Zack Commercial

August 16, 2023August 16, 2023 Master Builder

720 – Inside F

February 8, 2024February 9, 2024 Master Builder

EXPLORE MORE OFFICIAL SETS

Official Sets Space Port Town Town Sets Very Small Builds

6458: Satellite with Astronaut

December 17, 2025December 17, 2025 Master Builder

Year Released: 1999BricklinkInstructions

Classic Town Official Sets Small Builds Town Town Sets Traffic

6590: Vacation Camper

July 8, 2022July 8, 2022 Master Builder

Castle Castle Sets Lion Knights Official Sets Small Builds

6039: Twin Arm Launcher

April 10, 2021April 10, 2021 Master Builder

Ice Planet 2002 Ice Planet 2002 Sets Official Sets Small Builds Space

6834: Celestial Sled

February 9, 2021February 9, 2021 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

6870: Space Probe Launcher

January 12, 2021January 12, 2021 Master Builder

Episode II Large Builds Official Sets Star Wars Star Wars Sets

7133: Bounty Hunter Pursuit

July 14, 2021July 14, 2021 Master Builder

Classic Town Large Builds Official Sets Police Town Town Sets

6348: Surveillance Squad

June 23, 2026June 23, 2026 Master Builder

ABCs Classic Space Classic Space Sets Medium Builds Official Sets Space

6892: Modular Space Transport

November 17, 2021July 31, 2023 Master Builder

Classic Town Official Sets Police Small Builds Town Town Sets

6533: Police 4×4

January 6, 2022January 6, 2022 Master Builder

Black Falcons Castle Castle Sets Official Sets Small Builds

6030: Catapult

April 2, 2022April 2, 2022 Master Builder

Classic Space Classic Space Sets Large Builds Official Sets

6971: Inter-Galactic Command Base

September 12, 2019September 28, 2019 Master Builder

Castle Castle Sets Crusaders Daniel August Krentz Extra Large Builds Official Sets

6081: King’s Mountain Fortress

June 30, 2022July 29, 2023 Master Builder

Life on Mars Life on Mars Sets Official Sets Very Small Builds

7310: Mono Jet

April 16, 2021April 16, 2021 Master Builder

Medium Builds Official Sets Town Town Sets

6381: Motor Speedway

October 5, 2019February 19, 2023 Master Builder

Classic Space Classic Space Sets Medium Builds Official Sets Space

6926: Mobile Recovery Vehicle

October 12, 2021October 12, 2021 Master Builder

Divers Official Sets Town Town Sets Very Small Builds

6555: Sea Hunter

February 8, 2023February 8, 2023 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

There were once pictures of additional LEGO® builds on the back of set boxes. Written on the boxes was typically something about the endless building possibilities, "Build any of these exciting models with this set!" There were no instructions for these alternate builds, until now.

Sets

Adventurers
Aquazone
BATMAN
Bionicle
Belville
Building Set with People
Castle
Duplo
Fabuland
Harry Potter
Holiday and Event
LEGOLAND
Model Team
Pirates
Space
Star Wars
Technic
Train
Town
Universal Building Set
Western
More Sets
Misc

Useful Links

Submit Instructions!
New Instructions
New Official Sets
New Alternate Builds
Minifigs
Very Small Builds (<35 pcs)
Small Builds (<100 pcs)
Medium Builds (<200 pcs)
Large Builds (<400 pcs)
Extra Large Builds (>400 pcs)
How BOTBB was Built

In Honor of 1526

The classic space set that never was.

Copyright © 2026 Back of the Box Builds. All rights reserved. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize, or endorse this site.