Disclaimer (I think): Do not sell this model, it belongs to Bandai NAMCO.
This is the old broken Stonehenge (Huge cannon) from mission 12.
The only time I printed this was at about the size of a penny, hence the 0.05mm layer height, but you can probably use any layer height. For extra quality, enable support roofs.
I used Ninja Ripper to pull the model directly out of Ace Combat 7, no other modification was done.