1. Introduction
This manual provides detailed instructions for assembling and operating your MISTBUY WW2 Military Building Set, model 88066. This set includes two iconic World War II models: the BF109 Fighter Jet and the Karl Giant Mortar Tank. With 1015 pieces, this kit offers an engaging building experience and highly detailed models for display and interactive play.

Image 1.1: MISTBUY WW2 Military Building Set, featuring the BF109 Fighter Jet and Karl Giant Mortar Tank.
2. Safety Information
WARNING: CHOKING HAZARD - Small parts. Not for children under 3 years.
- Keep all small parts away from young children to prevent choking.
- Adult supervision is recommended during assembly, especially for younger builders.
- Ensure all connections are secure to prevent parts from detaching during play.
3. What's in the Box
Your MISTBUY WW2 Military Building Set contains the following components:
- 1015 Building Blocks (separated into numbered bags for assembly stages)
- Instruction Manuals (one for the BF109 Fighter Jet, one for the Karl Giant Mortar Tank)
- Accessory pieces including small army tanks, machine guns, rocket artillery, and mortars.
Video 3.1: Unboxing and overview of the MISTBUY WW2 Military Building Set components.
4. Assembly Instructions
Follow the step-by-step instructions provided in the individual manuals for each model. Sort pieces by color and shape before beginning to facilitate the building process.
4.1. BF109 Fighter Jet Assembly
The BF109 Fighter Jet model features an opening cockpit, retractable landing gear, and a rotatable propeller. Pay close attention to the details for these functional elements during assembly.

Image 4.1.1: The completed BF109 Fighter Jet model.
4.2. Karl Giant Mortar Tank Assembly
The Karl Giant Mortar Tank model includes walkable tracks and an adjustable turret. Ensure the gears for the turret mechanism are correctly aligned for smooth operation.

Image 4.2.1: The completed Karl Giant Mortar Tank model.
Video 4.2.2: Detailed demonstration of the BF109 Fighter Jet and Karl Giant Mortar Tank building process and features.
5. Operating Instructions
5.1. BF109 Fighter Jet
- Opening Cockpit: Gently lift the clear canopy piece to open the cockpit.
- Retractable Landing Gear: The landing gear can be manually retracted and extended for flight or landing configurations.
- Rotatable Propeller: The front propeller can be manually spun.
5.2. Karl Giant Mortar Tank
- Adjustable Turret: Use the crank on the side of the tank body to adjust the mortar's elevation (swing the turret up and down).
- Walkable Tracks: The tank features functional tracks that allow it to roll across surfaces.

Image 5.2.1: Karl Giant Mortar Tank with adjustable turret.

Image 5.2.2: Karl Giant Mortar Tank with functional sliding tracks.

Image 5.1.1: BF109 Fighter Jet with retractable landing gear.

Image 5.1.2: BF109 Fighter Jet with opening cockpit.
6. Maintenance
- To clean the models, gently wipe with a dry or slightly damp cloth. Avoid harsh chemicals.
- Store the models in a cool, dry place away from direct sunlight to prevent discoloration or warping of plastic parts.
- Periodically check for loose connections and re-secure any detached pieces.
7. Troubleshooting
- Missing Pieces: If you find any pieces missing, please contact MISTBUY customer support with details of the missing part and your purchase information.
- Difficulty Connecting Pieces: Ensure pieces are correctly oriented and apply firm, even pressure. Some new pieces may require a bit more force initially.
- Models Not Holding Together: Double-check the assembly steps in the manual. Incorrectly placed pieces can affect structural integrity.
8. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 11 x 8.5 x 2.2 inches (packaging) |
| Item Weight | 1.46 pounds |
| ASIN | B0D1Y2867F |
| Manufacturer Recommended Age | 8 years and up |
| Total Pieces | 1015 |
| Models Included | BF109 Fighter Jet, Karl Giant Mortar Tank |

Image 8.1: Dimensions of the assembled models.
9. Warranty and Support
For any inquiries regarding product defects, missing parts, or general support, please refer to the contact information provided with your purchase or visit the official MISTBUY website. Specific warranty details may vary and are typically outlined in the product packaging or on the manufacturer's website.