I printed a small 30% scale model as a test run (sent it to a friend). The full scale model barely fit on my 220x220 mm table, but it printed nicely for the most part. I had a de-lamination issues since my garage is so cold, but nothing some ABS juice couldn't fix. Sanded and painted it after gluing it together.
I would reprint the barrel at 97% scaled down so it doesn't fit as snug when assembled. I glued in some magnets too, fun build all together!