UPDATED! Modular building for 28mm miniature tabletop wargames(Part 21)

thingiverse

You can repurpose this design as a tunnel entrance, a missile silo, or anything else your imagination comes up with. The hatches don't have modeled hinges, so you'll need to attach them in place if you want them to be open by default. 2019-12-11 New hatches are now included, along with a missile ramp that doubles as a hatch, effectively transforming the entire tunnel entrance into a fully functional missile site.