Sturmtiger Assault Gun 1:35 Scale Movable Barrel

Sturmtiger (German for 'Assault Tiger') was a World War II German assault gun built on the Tiger I chassis and armed with a 380mm rocket-propelled mortar.

I spent a lot of time, and with a lot of materials, testing movable barrels.

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📋 Recommended Print Settings (For Best Results) 

• Filament: PLA. Different materials have different shrink rates, so using other filaments might cause fitting issues or dimensional errors during assembly. 
• Slicer: Bambu Studio. I recommend using my default profile — I’ve tuned it specifically for this model. 
• Ambient Temperature: If you’re using an open-frame printer like the A1 or A1 Mini, keep your room above 20°C (68°F) to prevent warping. 
• Print Bed Preparation: Wash with soap and water, then dry thoroughly to ensure good adhesion. For small parts, apply a glue stick for better bed adhesion. 

🔧 Assembly Diagram Notes 

• You’ll need super glue to attach all the components together. This is an early build of mine, so all the wheels need to be glued in place.

I designed a simple spring mechanism to lock the gun barrel, allowing it to move while providing enough friction to hold it in place.

The Tiger tank’s running gear features a famously overengineered interleaved road-wheel system. I’ve done my best to make it 3D printer–friendly — unlike the poor German logistics crews in WWII, you won’t need a wrench, a crane, and a week of your life to put it together.

Below are the installation procedures for these assemblies: