1. Product Overview
The LEGO Marvel Super Heroes 76105 The Hulkbuster: Ultron Edition is a highly detailed building kit designed for enthusiasts aged 14 and up. This model allows you to construct a brick-built version of the iconic Hulkbuster mech, featuring various interactive elements and a display platform.

Image: The fully assembled Hulkbuster: Ultron Edition model, showcasing its detailed design and accompanying accessories on a display platform.
The kit includes 1363 pieces, allowing for a comprehensive and engaging building experience. Once assembled, the Hulkbuster features a rotating torso, posable fingers, arms, legs, and feet, enhancing its display and play versatility. It also incorporates glow-in-the-dark elements and a LEGO light brick in the chest for added visual appeal.
Two interchangeable left arms are provided: a standard arm and a jackhammer arm with a punching function, offering customization options for the model.
2. Assembly Instructions
This LEGO building kit requires assembly. Please follow the detailed, step-by-step instructions provided in the included instruction booklet. Sort all pieces before beginning assembly to ensure all components are present and to streamline the building process.

Image: An overview of the LEGO Hulkbuster: Ultron Edition kit components, including the main mech, display base, robotic arms, and Iron Man minifigure.
The assembly process is designed to be intuitive, with clear visual guides for each step. Ensure all connections are firm to maintain the structural integrity of the model. The kit also includes a new-for-March-2018 Iron Man Mark 43 minifigure, which can be placed inside the Hulkbuster's cockpit.

Image: A child engaged in the assembly of the LEGO Hulkbuster: Ultron Edition, demonstrating the hands-on building experience.
The display platform features alternate attachment points for posable robotic construction arms and a desk, allowing for dynamic presentation of the completed model.
3. Operating Instructions
The Hulkbuster: Ultron Edition model offers several interactive features:
- Cockpit Access: The Hulkbuster features a flip-up head and an opening cockpit to place the Iron Man Mark 43 minifigure inside.
- Light Brick Activation: A LEGO light brick is integrated into the chest. To activate, press the designated button or mechanism within the chest area.
- Posable Joints: The model includes posable fingers, arms, legs, and feet, allowing for a variety of dynamic poses. Carefully adjust each joint to achieve desired positions.
- Interchangeable Arms: The left arm can be swapped between the standard arm and the jackhammer arm. To change, gently detach the current arm and attach the desired alternative. The jackhammer arm features a punching function.

Image: The Hulkbuster's head mechanism, showing how it flips up to allow access to the minifigure cockpit.

Image: The Hulkbuster's chest with its light brick activated, emitting a glow.

Image: A detailed view of the Hulkbuster's hand, illustrating the posable fingers.

Image: The Hulkbuster's left arm equipped with the jackhammer attachment, demonstrating its unique design.
4. Maintenance
To ensure the longevity and appearance of your LEGO Hulkbuster model, follow these maintenance guidelines:
- Cleaning: Dust the model regularly with a soft, dry cloth or a soft-bristled brush. For deeper cleaning, gently wash individual bricks with mild soap and lukewarm water (not exceeding 40°C / 104°F). Rinse thoroughly and air dry. Avoid harsh chemicals or abrasive materials.
- Storage: Store the model in a cool, dry place away from direct sunlight to prevent discoloration and material degradation.
- Handling: Handle the model with care, especially when adjusting posable joints, to prevent accidental detachment of pieces.
- Battery Replacement: The light brick requires 2 LR44 batteries. Replace batteries when the light dims or stops working. Ensure correct polarity when inserting new batteries.
5. Troubleshooting
If you encounter any issues with your LEGO Hulkbuster: Ultron Edition, consider the following:
- Missing Pieces: If you find any missing pieces during assembly, please contact LEGO Customer Service for assistance.
- Loose Connections: If parts feel loose, ensure they are firmly pressed together according to the instruction manual.
- Light Brick Not Working: Check if the batteries are correctly inserted and have sufficient charge. Replace batteries if necessary.
6. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 14.88 x 18.9 x 3.7 inches |
| Item Model Number | 6212609 |
| Manufacturer Recommended Age | 14 years and up |
| Batteries Required | 2 LR44 batteries |
| Release Date | March 6, 2018 |
| Manufacturer | LEGO SYSTEM A/S |
7. Warranty and Support
LEGO products are manufactured to high-quality standards. For information regarding warranty, missing parts, or customer support, please visit the official LEGO website or contact their customer service directly. Keep your proof of purchase for any warranty claims.
You can find additional support and contact information on the LEGO Store on Amazon.