Setting that aside, perhaps you know of another country with a voluntary force and a judicial branch upholding Heller[1] and Bruen[2]?
Even a cursory understanding of mil force is enough to seriously question your unsupported assumption. It's why we have the 2nd right after the 1st.
[1] Justice Antonin Scalia reading Heller(2008)[1] for the majority: https://s3.amazonaws.com/oyez.case-media.ogg/case_data/2007/...
[2] https://www.oyez.org/cases/2021/20-843