Skip to content
Back of the Box Builds

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
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP
Alternate Builds Instructions Added Small Alt Build Small Builds Space Space Police II Space Police II Alternate Builds 

6852 – Back A

September 22, 2020October 25, 2021 Master Builder 5995 Views

From: 6852: Sonar Security
Name: Probing Protector 1
Instructions: View PDF | PDF (Photo Sequence) 2 | Download .io File

Contributions

  1. Name, PDF, and .io file submitted on July 17, 2021 by: IceAge2002
  2. PDF (Photo Sequence) submitted on September 20, 2020 by: Dru Betts
  • ← 6852: Sonar Security
  • 6852 – Back B →

You May Also Like

6861 – Back C

June 28, 2022May 17, 2023 Master Builder

6247 – Back B

May 10, 2022May 10, 2022 Master Builder

7411: Tygurah’s Roar

December 16, 2025December 16, 2025 Master Builder

2151: Robo Raider

January 14, 2021September 3, 2025 Master Builder

6951 – Back D

September 21, 2019October 25, 2021 Master Builder

6075-1 – Back A

October 11, 2021June 30, 2022 Master Builder

EXPLORE MORE OFFICIAL SETS

6901-2: Space Plane
Duplicate Set Number Official Sets UFO UFO Sets Very Small Builds 

6901-2: Space Plane

December 16, 2025December 16, 2025 Master Builder

Year Released: 1998BricklinkInstructions

6837: Cosmic Creeper (Mantis Scavenger)
ABCs Insectoids Insectoids Sets Official Sets Small Builds 

6837: Cosmic Creeper (Mantis Scavenger)

April 2, 2020March 22, 2025 Master Builder
1793: Space Station Zenon
Large Builds Official Sets Space Unitron Unitron Sets 

1793: Space Station Zenon

April 19, 2021April 19, 2021 Master Builder
6035: Castle Guard
Black Falcons Castle Castle Sets Official Sets Small Builds 

6035: Castle Guard

December 27, 2021December 27, 2021 Master Builder
1730: Snow Scooter
Classic Town Off-Road Official Sets Town Town Sets Very Small Builds 

1730: Snow Scooter

April 11, 2023April 11, 2023 Master Builder
6919: Planetary Prowler
Insectoids Insectoids Sets Large Builds Official Sets 

6919: Planetary Prowler

November 9, 2019November 9, 2019 Master Builder
6581: Dig N’ Dump
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6581: Dig N’ Dump

November 7, 2022November 7, 2022 Master Builder
379: Bus Station
Classic Town Medium Builds Official Sets Town Town Sets Traffic 

379: Bus Station

April 10, 2021May 31, 2023 Master Builder
6903: Bug Blaster
Insectoids Insectoids Sets Official Sets Space Very Small Builds 

6903: Bug Blaster

October 4, 2024October 4, 2024 Master Builder
6078: Royal Drawbridge
Castle Castle Sets Daniel August Krentz Large Builds Official Sets Royal Knights 

6078: Royal Drawbridge

January 12, 2022July 29, 2023 Master Builder
7704: Sonic Phantom
Exo-Force Medium Builds Official Sets 

7704: Sonic Phantom

April 28, 2023April 28, 2023 Master Builder
6440: Jetport Fire Squad
Airport Classic Town Medium Builds Official Sets Town Town Sets 

6440: Jetport Fire Squad

December 29, 2021December 29, 2021 Master Builder
6467: Power Pitstop
Official Sets Race Small Builds Town Town Jr Town Sets 

6467: Power Pitstop

June 23, 2025June 23, 2025 Master Builder
7303 (1415, Kabaya: Life On Mars 3): Jet Scooter
Life on Mars Life on Mars Sets Official Sets Very Small Builds 

7303 (1415, Kabaya: Life On Mars 3): Jet Scooter

February 25, 2025February 25, 2025 Master Builder
6499: Time Tunnelator with Time Machine
Box Plus Different Box Versions Official Sets Playscape/Play Stage Box Small Builds Time Cruisers Time Cruisers Sets 

6499: Time Tunnelator with Time Machine

March 5, 2026March 5, 2026 Master Builder
6097: Night Lord’s Castle
Box Story Castle Castle Sets Extra Large Builds Fright Knights Official Sets 

6097: Night Lord’s Castle

March 1, 2023March 17, 2025 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
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.