Regelbau L401a Large German Flak Bunker

Room for the troops and home to a big gun.

Regelbau L401a Large German Flak Bunker - STL


The bunker model was originally designed to be used by the German Air Force (Luftwaffe

This model is part of the application group: Open gun positions (Offene Kampfstände).

There were 6 examples of this bunker in Denmark.

The bunker was built from reinforced concrete. Assuming no special alterations were made then 840 m³ was used



This STL file is designed for FDM Printers and print with a 0.6mm nozzle at 0.3mm layer height. Epic scale will require 0.4mm nozzle at 0.2mm layer height for best finish.

Supports are not needed for this model. At larger scales these bunkers may become larger than more common build-plate sizes, you may need to cut them into sections for your machine. Please check the size below.

**This is a very large model and at some scales may not be suitable for a smaller printer**


The printed model measures approx.:
286mm x 245mm x 115mm @28mm Scale

207mm x180mm x 80mm @00 Railway scale

143mm x 122mm x 56mm @15mm Scale

63mm x 55mm x 25mm @Epic scale



We have a handy calculator for resizing files for 3D printing over at scale-converters


It is designed for 28mm table top games set in WW2 such as:
Bolt Action, Chain of Command and Konflikt ’47. It can also be used in games such as Judge Dredd, Necromunda and Fallout Wasteland.

Now rescaled to for Flames of War, epic and 00 railways by popular demand.



See the blog post notes on scales about resizing STL files.

Some of the images supplied are computer generated and are for reference. They are images of the files that will be 3D printed.